Problem: How does the sentence end?

Jake replaced his metal bike for a carbon one because the 
OPTIONS:
- metal was too heavy.
- carbon was too heavy.
Answer: metal was too heavy.

Problem: How does the sentence end?

Matthew started the fundraisers and Eric donated to it, so 
OPTIONS:
- Matthew was successful in giving some money.
- Eric was successful in giving some money.
Answer: Eric was successful in giving some money.

Problem: How does the sentence end?

His reasons helped me understand the tasks a lot better than before, because the 
OPTIONS:
- reasons were confusing.
- tasks were confusing.
Answer: tasks were confusing.

Problem: How does the sentence end?

People at the meeting felt more intimidated by Mary than by Betty because 
OPTIONS:
- Mary was more meek.
- Betty was more meek.
Answer:
Betty was more meek.