In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

[EX Q]: Title: Brain Freeze. Sentence 1: Ollie was walking in the park. Sentence 2: He bought an ice cream from a vendor. Sentence 3: He bit into the ice cream. Sentence 4: It was very cold and he got a brain freeze. Choices: a. Ollie jumped up and down as his father laughed. b. He should've done more research!
[EX A]: a

[EX Q]: Title: New Locks. Sentence 1: Ronny had broken up with his girlfriend. Sentence 2: He kicked her out the house. Sentence 3: Ronny's girlfriend refused to give him back the house key she had. Sentence 4: Ronny went to the hardware store for a replacement lock. Choices: a. It was ruined and he had to order pizza. b. He replaced the locks and keys.
[EX A]: b

[EX Q]: Title: Flower. Sentence 1: Reyes loved his rose bush. Sentence 2: His grandmother had planted it before she passed away. Sentence 3: Suddenly, one day it began rotting. Sentence 4: Reyes used all his money to save the rose bush. Choices: a. The rose bush was able to barely survive. b. Then, he found it in the fridge.
[EX A]:
a