Sentence 1: Lilly received a birthday gift. 
 Sentence 3: At first, the store clerk wouldn't accept her return 
 Sentence 4:  Luckily, she was able to convince them with some arguing 
 Sentence 5:  She ended up picking out a nice dress instead 
 Option 1: She couldn't fit into the shirt so she wanted to return it. 
 Option 2: She couldn't fit into the shirt so she wanted to return it but will never pick a dress.