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.

Title: A New Dress. Sentence 1: Joanna was very excited. Sentence 2: Today was her birthday. Sentence 3: Her mother took her out to go shopping. Sentence 4: They went into a clothes store and tried on dresses. Choices: a. Joanna got a beautiful new dress and was so happy. b. Her mom said no.
a

Title: Hey that isn't me. Sentence 1: Two twins were shopping. Sentence 2: One of the twins left the store stealing a coat. Sentence 3: The security man sees this and rushes to catch him. Sentence 4: The security man catches the innocent twin. Choices: a. He had tripped over his laces on the stairs, fell and broken his arm. b. The innocent twin is taken to jail for a crime he didn't commit.
b

Title: Water. Sentence 1: I was appalled that my water bill was so high. Sentence 2: I decided to take shorter showers. Sentence 3: I did not flush the toilet after every use. Sentence 4: When my water bill arrived, I opened it hopefully. Choices: a. The next morning she wakes up and realizes she has won the jackpot! b. I was pleased that I had saved a dollar on my water bill.
b