[Q]: How does the sentence end?

Erin was more concerned about an infection than Katrina because 
OPTIONS:
- Erin had a poor immune system.
- Katrina had a poor immune system.

[A]: Erin had a poor immune system.
QUES: Continue writing.

James could not comprehend the topics in the book within the time give to him because the 

OPTIONS:
- time is short.
- topic is short.
+++++++++
ANS: time is short.
Problem: How does the sentence end?

Emily took care of Christine while they were ill, because 
OPTIONS:
- Emily had a sickly nature.
- Christine had a sickly nature.
Answer: Christine had a sickly nature.
sentence: The heart surgery center was not covered by insurance because the   OPTIONS:
- center paid too little money for the procedure.
- insurance paid too little money for the procedure.
complete: insurance paid too little money for the procedure.
The brother shared his toys, though kept his books to himself, because the 
OPTIONS:
- toys were the most important thing to him.
- books were the most important thing to him.
books were the most important thing to him.
Problem: Continue the following story.

The marker had a better point than the pencil, because the 
OPTIONS:
- pencil was new and fresh.
- marker was new and fresh.
Here's how I want to continue it:
marker was new and fresh.