Problem: How does the sentence end?

The choice was to give Aaron the document and not Brian because 
Answer: Brian was a lot more immature.

Problem: How does the sentence end?

Victoria uses more oil when frying chicken than Maria because 
Answer: Victoria doesn't care about cholesterol.

Problem: How does the sentence end?

Natalie didn't want to take care of a snail but Megan did because 
Answer: Natalie heard they were hard to take care of.

Problem: How does the sentence end?

Neil had fun all the time sometimes at the expense of Nelson. 
Answer:
Neil saw nothing wrong with this.