Problem: How does the sentence end?

I know I should use a board to iron my clothes on, but I usually just use a towel because the 
OPTIONS:
- board is more convenient.
- towel is more convenient.
Answer: towel is more convenient.

Problem: How does the sentence end?

Jenna was deciding between a gold or platinum wedding ring for her husband, and she thought the 
OPTIONS:
- gold would be more unusual.
- platinum would be more unusual.
Answer: platinum would be more unusual.

Problem: How does the sentence end?

Katrina asked Jennifer which drug would be the most effective because 
OPTIONS:
- Katrina was a pharmacist.
- Jennifer was a pharmacist.
Answer: Jennifer was a pharmacist.

Problem: How does the sentence end?

The activities that he had planned out could not fit into the schedules because the 
OPTIONS:
- activities were full.
- schedules were full.
Answer:
schedules were full.