Problem: How does the sentence end?

Brian agreed to take on the lawsuit case for Randy because 
Answer: Randy was completely innocent.

Problem: How does the sentence end?

The spectacles could not detect newly formed stars but the telescopes could. This is because the 
Answer: telescopes were very strong.

Problem: How does the sentence end?

The taste of tomatoes really appeals to Joel but not to Adam. 
Answer: Adam ordered the fried chicken wings for their appetizer.

Problem: How does the sentence end?

Rebecca is making a chocolate cake for Tanya's birthday, because 
Answer:
Rebecca wants to make him happy.