[Q]: How does the sentence end?

The sick man decided on surgery instead of taking medication. The 
OPTIONS:
- surgery must have more reliable results.
- medication must have more reliable results.

[A]: surgery must have more reliable results.
QUES: Continue writing.

Bill cut the cake with a spatula even though his wife told him to use the knife, because the 

OPTIONS:
- knife was dirty.
- spatula was dirty.
+++++++++
ANS: knife was dirty.
Problem: How does the sentence end?

Kevin bought a brand new truck unlike Joel because 
OPTIONS:
- Kevin had a much better job.
- Joel had a much better job.
Answer: Kevin had a much better job.
sentence: Jason stayed in bed all day long but not Derrick because  OPTIONS:
- Jason had gone to sleep early last night.
- Derrick had gone to sleep early last night.
complete: Derrick had gone to sleep early last night.
The eggs were able to reflect the light and not the glasses since the 
OPTIONS:
- eggs are dark colored.
- glasses are dark colored.
glasses are dark colored.
Problem: Continue the following story.

Eric received essential oils as a birthday present from Brian, because 
OPTIONS:
- Eric thought they would help.
- Brian thought they would help.
Here's how I want to continue it:
Brian thought they would help.