Problem: How does the sentence end?

When it comes to travel, Eric likes to ride a bicycle, but William uses a car. This is due to 
OPTIONS:
- Eric being environmentally ignorant.
- William being environmentally ignorant.
Answer: William being environmentally ignorant.

Problem: How does the sentence end?

Emily found standup comedy difficult but it came naturally to Victoria. 
OPTIONS:
- Emily had always had a thick skin for hecklers.
- Victoria had always had a thick skin for hecklers.
Answer: Victoria had always had a thick skin for hecklers.

Problem: How does the sentence end?

Angela was filling out a report for Elena for 
OPTIONS:
- Angela forgot how to put all the facts and figures in a easily digestable format.
- Elena forgot how to put all the facts and figures in a easily digestable format.
Answer: Elena forgot how to put all the facts and figures in a easily digestable format.

Problem: How does the sentence end?

Christopher wasn't a plumber but he knew Matthew was so 
OPTIONS:
- Christopher called him to fix his sink.
- Matthew called him to fix his sink.
Answer:
Christopher called him to fix his sink.