You will be given a definition of a task first, then some input of the task.
In this task, you're given four sentences of a story written in natural language. The given story is not complete and your job is to complete the story by selecting one of the sentence choices from (A) and (B), such that the story sounds fully coherent.

Sentence1: Mom asked me to go pick up some things at the grocery store. Sentence2: I decided to take my bicycle to the store instead of walking. Sentence3: I met up with a friend and offered her a ride on my bicycle. Sentence4: As we were riding along, my bicycle broke in half. 
 (A) I realized that my bicycle had only been suitable for one rider. (B) I carelessly threw my used Kleenex in the gutter.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A