[Q]: How does the sentence end?

Rachel is making a lined storage bin for Felicia, because 
OPTIONS:
- Rachel wants to surprise her.
- Felicia wants to surprise her.

[A]: Rachel wants to surprise her.
QUES: Continue writing.

Robert assisted placing the legs of Kevin into the wheelchair because 

OPTIONS:
- Robert was the nurse in physical therapy.
- Kevin was the nurse in physical therapy.
+++++++++
ANS: Robert was the nurse in physical therapy.
Problem: How does the sentence end?

Bob wanted to sell his piano and buy a keyboard, because the 
OPTIONS:
- piano was new.
- keyboard was new.
Answer: keyboard was new.
sentence: Angela had really terrible skin and Maria did not.   OPTIONS:
- Angela bought a face mask at the store.
- Maria bought a face mask at the store.
complete: Angela bought a face mask at the store.
Olivia prefer packing for vacation more than packing for moving. The 
OPTIONS:
- packing for moving is easy for her.
- packing for vacation is easy for her.
packing for vacation is easy for her.
Problem: Continue the following story.

Sarah had fewer ants in their house than Jennifer because 
OPTIONS:
- Sarah left pesticide where the ants were.
- Jennifer left pesticide where the ants were.
Here's how I want to continue it:
Sarah left pesticide where the ants were.