Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
An Unsolved Mystery “Tell Judy about it,” begged Lois. “Please, Lorraine, in to serve dessert to the two friends she had invited for lunch at Peter’s suggestion. “I do have problems, and there are plenty of mysteries I can’t “Very well,” Judy agreed. “What shall we talk about?” “You,” Lois said, “and all the mysteries you’ve solved. Maybe you were mistaken about a thing or two before the flood, but what about the haunted house you moved into? You were the one who tracked down the ghosts in the attic and the cellar and goodness knows where all. You’ve been chasing ghosts ever since I met you, and not one of them did what she was or how she spoke to me is more than I know. If my grandparents knew, they weren’t telling. And now they’re both dead and I can’t ask them. They left me a lot of unsolved mysteries along with this house. Maybe I’ll find the answers to some of them when I finish sorting Grandma’s things. They’re stored in one end of the attic.” his father’s desk and forged the names of a lot of important Lois. “Why don’t you have another ghost party and “Another haunted attic? How thrilling!” exclaimed to gossip. “Forgery, I guess. He stole some checkbooks from “I didn’t say the attic was haunted.” Judy was almost sorry she had mentioned it. She wasn’t in the mood for digging up old mysteries, but Lois and Lorraine insisted. It all began, she finally Now Judy did remember. It was something she show up the spooks?” had just started working on the paper. Judy remembered he spent the summer Judy was remembering in Farringdon mansion, while she had to suffer the heat and loneliness of Dry Brook Hollow. Her thoughts were what had made it so hard, she confessed now as she reviewed everything that had happened. She just couldn’t help resenting the fact that her parents left her every summer while they went off on a vacation by themselves. What did they think she would do? “You’ll have plenty to read,” her father had told her. “I bought you six new books in that mystery series you like. When they’re finished there are plenty of short stories around. Your grandmother never throws anything away. She has magazines she’s saved since your mother was a girl. If you ask for them she’ll let you have the whole stack. I know how vacation much more than a schoolgirl who had too little to do. He and Judy’s mother usually went to was a precious memory. Every summer Dr. Bolton and his wife relived it. And every summer Judy went to stay with her grandmother Smeed, who scolded and fussed and tried to pretend she wasn’t glad to have her. “Read,” Judy had told her. “Mom and Dad say you have a whole stack of old magazines—” “In the attic. Go up and look them over if you can stand the heat.” Judy went, not to look over the old magazines so birthday. In another year she would have outgrown her childish resentment of her parents’ vacation or be grown up enough to ask them to let her have a vacation of her own. In another year she would be summering among the beautiful Thousand Islands and solving a mystery to be known as the Ghost Parade . “A whole parade of ghosts,” Lois would be telling her, “and you solved everything.” But then she didn’t even know Lois. She had no she was to see on her honeymoon at Niagara Falls. summer Judy found the picture of a fountain and “But that would make it enchanted!” she had suddenly exclaimed. “If I could find it I’d wish—” A step had sounded on the stairs. Judy remembered it distinctly. She had turned to see her grandmother She and Lorraine had listened to this much of what Judy was telling them without interruption. “That’s the unsolved mystery,” Judy replied. “There weren’t any of them impossible.” And she went on to tell them how, the very next day, her grandparents had taken her to a fountain grandmother’s house,” the mysterious voice had reminded her. “Weren’t you crying on my picture up there in the attic?” “Then you—you are airily, “Oh, didn’t I tell you? I wished for lots of friends and a sister, and I wished I could marry a G-man and solve a lot of mysteries and that’s as far answered, “I was still little girl enough to think so at the time. I wandered around, growing very drowsy. Then I found a hammock and climbed into “Yes, yes. Go on,” entreated Lois. “I didn’t dream you’d kept anything that exciting a secret. Why didn’t you try to solve the mystery?” “I think I would have tried,” Judy admitted, “if I had been older or more experienced. I really should “You have?” asked Judy. “Then maybe you’ve seen the one I’ve been telling you about. I think the picture of it is still in the attic. Come on up and I’ll Like Peter, her FBI husband, she preferred facts show you.” He wants to explore the attic, too.” “He’ll remember he’s a cat fast enough if there are any mice up there,” Lois said with a giggle. Leaving the table, they all started upstairs with the cat bounding ahead of them. In modernizing her grandparents’ house to suit her own and Peter’s tastes, Judy had seen to it that the old stair door was removed. But there was still a door closing off the narrower stairs that led to the attic. Blackberry reached it first and yowled for Judy to open it. “He can read my mind. He always knows where Pausing at still another door that led to the darker part of the attic, she turned and said mysteriously, “Up here we can all turn back the clock. Does anybody care to explore the past?” “When I told Grandma about it she laughed and said I must have dreamed it. She said if wishes came true that easily she’d be living in a castle. But would you see on that high shelf by the window. I think she and Grandpa like the way they lived without old attic with a shiver. “It is strange they both died the same winter, isn’t it?” “Maybe they wanted it that way. Maybe they thoughtfully, “I’m sure that was one of their wishes. Another could have been to keep the good old days, as Grandma used to call them. That one came true in a way. They did manage to keep a little of the past when they kept all these old things. That’s what she’d wish for one exactly like it. “Well, you know what your grandmother said about wishes, don’t you?” Lorraine asked. “If you let people know about them instead of muttering old farm wagon. I do remember that Grandma had some hooked rugs to deliver. But that still doesn’t up in the hammock I was alone in the garden. Horse, wagon, grandparents—all had disappeared.” “How could they?” asked Lois. “Anyway,” Lorraine began, “you had a chance to but you never did explain how you got back home,” Lorraine reminded her. “Didn’t I?” asked Judy. “I’d forgotten a lot of it, grandparents had left me in the garden for a surprise and would return for me. I told you I was all alone. There wasn’t a house in sight.” “I think now it was just to tease me. He did stop and wait for me after a while,” Judy remembered. “The rugs were gone. Grandma must have delivered them, but I didn’t ask where. If she made them for Mrs. Brandt they may still be there.”

<question>:
Why did Judy spent a week with her grandmother for a week during summer?

<options>:
A So that her parents could take a vacation.
B So that her grandmother would have an opportunity to spent time with her.
C So that her father, a doctor, could travel out of the country for work.
D So that she could solve mysteries that were filed away in her grandmother's attic.

<answer>:

A