[Q]: How does the sentence end?

Jeff needed to buy new shirts but not new pants because the 
OPTIONS:
- shirts he owned were worn out.
- pants he owned were worn out.

[A]: shirts he owned were worn out.
QUES: Continue writing.

James cannot put the new rod through the ring because the 

OPTIONS:
- rod is very narrow.
- ring is very narrow.
+++++++++
ANS: ring is very narrow.
Problem: How does the sentence end?

Samuel didn't love animals but Michael did, so 
OPTIONS:
- Samuel  took care of all the baby guppies today.
- Michael  took care of all the baby guppies today.
Answer: Michael  took care of all the baby guppies today.
sentence: Jeffrey's plant did not grow as fast as Brett's plant, because  OPTIONS:
- Jeffrey always remembered to water the plant.
- Brett always remembered to water the plant.
complete: Brett always remembered to water the plant.
The tree grew faster in the soil than the potted plant since the 
OPTIONS:
- tree was saturated with water.
- plant was saturated with water.
tree was saturated with water.
Problem: Continue the following story.

Derrick studied very hard in grad school but Hunter didn't, so 
OPTIONS:
- Derrick failed their exams with low marks.
- Hunter failed their exams with low marks.
Here's how I want to continue it:
Hunter failed their exams with low marks.