Problem: How does the sentence end?

Leslie hesitated before asking Kenneth, again, about the difference between poisonous and venemous; 
OPTIONS:
- Leslie always forgot.
- Kenneth always forgot.
Answer: Leslie always forgot.

Problem: How does the sentence end?

Fred wanted to retire, but he needed to invest in either stocks or bonds. He chose the 
OPTIONS:
- stocks because it was risky.
- bonds because it was risky.
Answer: stocks because it was risky.

Problem: How does the sentence end?

Robert but not Samuel was scared of marriage because 
OPTIONS:
- Robert did not have two prior marriages that failed.
- Samuel did not have two prior marriages that failed.
Answer: Samuel did not have two prior marriages that failed.

Problem: How does the sentence end?

The training of Neil was a lot more intense than that of Kenneth, due to 
OPTIONS:
- Neil 's job being more lenient.
- Kenneth 's job being more lenient.
Answer:
Kenneth 's job being more lenient.