Problem: How does the sentence end?

The prescription that Betty wrote for Jennifer's medication was hard to read, because 
OPTIONS:
- Betty had terrible handwriting.
- Jennifer had terrible handwriting.
Answer: Betty had terrible handwriting.

Problem: How does the sentence end?

Jason asked Benjamin to stir the boiling noodles because 
OPTIONS:
- Jason was further away from the pot.
- Benjamin was further away from the pot.
Answer: Jason was further away from the pot.

Problem: How does the sentence end?

Rachel took the spices from the bags and put them into jars until the 
OPTIONS:
- jars were all empty.
- bags were all empty.
Answer: bags were all empty.

Problem: How does the sentence end?

I noticed that Brian has a better metal detector than Kyle since 
OPTIONS:
- Brian used cheap materials to build his detector.
- Kyle used cheap materials to build his detector.
Answer:
Kyle used cheap materials to build his detector.