Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: Jane decided to take a trip to the Caribbean. Sentence 2: While on her trip, Jane was bitten by a mosquito. Sentence 3: Jane started to feel ill after being bitten. Sentence 4: Jane went to the hospital upon her return home. Sentence 5: Jane was diagnosed with the Zika virus. Choices: a. Sophia's Investment. b. Illness.

b