Story needs to be completed:
Christopher wanted to discourage Brian to volunteer with wetland protection agency,

My choice:
Brian is concerned with saving the planet.

Story needs to be completed:
Even though Carrie knew more about biology than Kayla,

My choice:
Kayla had a easy time explaining photosynthesis.

Story needs to be completed:
Since the man was trying to stick to his financial plan, he purchased the sandwich instead of the burger because the

My choice:
burger was expensive.

Story needs to be completed:
Medical treatments were a steady part of Aaron's life, but not Ian's because

My choice:
Ian ate healthy foods.