Problem: How does the sentence end?

Elena kept laughing at Mary in a mean way whenever she started singing because 
OPTIONS:
- Elena thinks she can't sing.
- Mary thinks she can't sing.
Answer: Elena thinks she can't sing.
sentence: Aaron loves walking, but Lawrence does not, so  OPTIONS:
- Aaron walks to work every morning when it's not raining.
- Lawrence walks to work every morning when it's not raining.
complete: Aaron walks to work every morning when it's not raining.
Eric received essential oils as a birthday present from Brian, because 
OPTIONS:
- Eric thought they would help.
- Brian thought they would help.
Brian thought they would help.
Input: Continue writing.

Robert enjoyed science experiments while Derrick was bored of them, so 
OPTIONS:
- Robert looked forward to physics class.
- Derrick looked forward to physics class.

Continued: Robert looked forward to physics class.
Story needs to be completed:
The opening of the museum garnered more attention than the opening of the salon, so people probably are ambivalent to the 
OPTIONS:
- museum because they are cultured.
- salon because they are cultured.

My choice:
salon because they are cultured.
Problem: How does the sentence end?

Blueberries were nasty in the pie, but delicious in the tart, since the 
OPTIONS:
- pie was made with complementary flavors.
- tart was made with complementary flavors.
Answer:
tart was made with complementary flavors.