Problem: How does the sentence end?

Derrick blew up their balloon with their breath while Joel used a helium tank, and 
Answer: Joel finished faster.

Problem: How does the sentence end?

Mary decided to negotiate the price of the house but Natalie just accepted the first offer, since 
Answer: Natalie was a novice businessperson.

Problem: How does the sentence end?

James tried to empty the drink from the bottle to the cup but the cup got full very quick. The 
Answer: bottle is big.

Problem: How does the sentence end?

Using vinegar to clean was normal for Betty but not Victoria because 
Answer:
Victoria didn't like the smell of vinegar.