The relationship of my friend was  more special than my marriage because the 
OPTIONS:
- relationship was two-sided.
- marriage was two-sided.
relationship was two-sided.

Cynthia stayed the night at Amy's house because 
OPTIONS:
- Cynthia needed help to recover after the surgery.
- Amy needed help to recover after the surgery.
Amy needed help to recover after the surgery.

The covering on the beets was more secure than the covering on the onions, so the 
OPTIONS:
- onions became spoiled.
- beets became spoiled.
onions became spoiled.