[Q]: How does the sentence end?

His challenges were easier than my problems, because the 
OPTIONS:
- challenges had a lot more steps.
- problems had a lot more steps.

[A]: problems had a lot more steps.
QUES: Continue writing.

My sister's children are really tech-savvy. They asked me for a tablet instead of a lego set because the 

OPTIONS:
- tablet is less advanced.
- lego set is less advanced.
+++++++++
ANS: lego set is less advanced.
Problem: How does the sentence end?

Jennifer gave the steaming cup of tea to Lindsey, because 
OPTIONS:
- Jennifer liked their tea hot.
- Lindsey liked their tea hot.
Answer: Lindsey liked their tea hot.
sentence: Rebecca was excited that Elena was coming over because  OPTIONS:
- Rebecca had been waiting for them to see their house for weeks.
- Elena had been waiting for them to see their house for weeks.
complete: Rebecca had been waiting for them to see their house for weeks.
William knew pregnancy much better than Derrick , so 
OPTIONS:
- William made sure to be present for the birth.
- Derrick made sure to be present for the birth.
William made sure to be present for the birth.
Problem: Continue the following story.

Rebecca left the sunroof open in the car while Mary always closed it. 
OPTIONS:
- Rebecca was anxious of getting mold and mildew in the seats.
- Mary was anxious of getting mold and mildew in the seats.
Here's how I want to continue it:
Mary was anxious of getting mold and mildew in the seats.