[Q]: How does the sentence end?

The wrinkles were getting bad on the comforter, so it was thrown in the dryer and not ironed with the iron as the 
OPTIONS:
- dryer was inefficient.
- iron was inefficient.

[A]: iron was inefficient.


[Q]: How does the sentence end?

My sister hated the new programs, but loved the old systems because the 
OPTIONS:
- programs were horrible.
- systems were horrible.

[A]: programs were horrible.


[Q]: How does the sentence end?

Katrina had an electric guitar, and Carrie had an acoustic, so 
OPTIONS:
- Katrina needed an amp for their instrument.
- Carrie needed an amp for their instrument.

[A]:
Katrina needed an amp for their instrument.