Problem: How does the sentence end?

The doctor injected the hormone through the neck rather than the arm, as the 
OPTIONS:
- neck was hesitant to circulate it.
- arm was hesitant to circulate it.
Answer: arm was hesitant to circulate it.
sentence: The girl bought the energy shake from the market to suppress her appetite, however the  OPTIONS:
- shake fell flat.
- market fell flat.
complete: shake fell flat.
Kenneth could write a song and Kyle could sing them so, 
OPTIONS:
- Kenneth wrote a beautiful song.
- Kyle wrote a beautiful song.
Kenneth wrote a beautiful song.
Input: Continue writing.

Leslie saved the seeds from their bell pepper for Eric, so that 
OPTIONS:
- Leslie would plant it in their garden.
- Eric would plant it in their garden.

Continued: Eric would plant it in their garden.
Story needs to be completed:
Neil had a larger coin collection than Joseph because 
OPTIONS:
- Neil had been collecting for longer.
- Joseph had been collecting for longer.

My choice:
Neil had been collecting for longer.
Problem: How does the sentence end?

Rachel needed Elena to pick up a medication at the store because 
OPTIONS:
- Rachel didn't have a car.
- Elena didn't have a car.
Answer:
Rachel didn't have a car.