I believe the answer is C
Your title depends on what your text and reasons are specifically about and what the information you are given is, however I would choose whichever one fits your information the best. However, they all are talking about bicycles. I would most likely choose the health benefits of bicycling.
When you feel compassion for someone else, it means you show kindness and willingness to understand and help others. Based on this, the sentence that best develops the theme about the importance of compassion for other people is - so she understood how he must feel - this is also similar to the saying "get into someone else shoes"
I believe the correct answer from the choices listed above is option B. The correct sentence would be "If she doesn't graduate in December, she willgraduate in June." This is the only sentence where the comma is in the right place while the others are wrongly placed.
