Problem: How does the sentence end?

Since Elena fell into the river while Rebecca remained in the boat, 
OPTIONS:
- Elena remained dry on the excursion.
- Rebecca remained dry on the excursion.
Answer: Rebecca remained dry on the excursion.

Problem: How does the sentence end?

Kenneth went to hike in the vast Canadian wilderness without Robert because 
OPTIONS:
- Kenneth doesn't like outdoors.
- Robert doesn't like outdoors.
Answer: Robert doesn't like outdoors.

Problem: How does the sentence end?

Megan's toilet was broken, so they called Cynthia to fix it, and 
OPTIONS:
- Megan was pleased that the work was done quickly.
- Cynthia was pleased that the work was done quickly.
Answer: Megan was pleased that the work was done quickly.

Problem: How does the sentence end?

Jennifer asked Mary for help understanding the diagnosis given by the doctor because 
OPTIONS:
- Jennifer had a lot of medical training.
- Mary had a lot of medical training.
Answer:
Mary had a lot of medical training.