Sentence1: Tina always wore a red bikini when she went to the beach. Sentence2: She was known for it and everyone expected to see her in one. Sentence3: One day she met her friends in a blue bikini and surprised them. Sentence4: They couldn't understand why she would wear something different. 
 (A) They liked the new bikini though. (B) Tina's friends knew how unpredictable she was.
A