[Q]: How does the sentence end?

Emily asked Cynthia to clean the bathroom sink for her, because 
OPTIONS:
- Emily had forgotten to do it.
- Cynthia had forgotten to do it.

[A]: Emily had forgotten to do it.
QUES: Continue writing.

He stopped buying at the shop and starting going to the store instead, because the 

OPTIONS:
- shop had steep prices.
- store had steep prices.
+++++++++
ANS: shop had steep prices.
Problem: How does the sentence end?

Nelson could not go to college without a scholarship but Randy did not need one so, 
OPTIONS:
- Nelson studied everyday.
- Randy studied everyday.
Answer: Nelson studied everyday.
sentence: We didn't use the dryer but opted for the clothesline instead, as the  OPTIONS:
- dryer would not let our clothes shrink.
- clothesline would not let our clothes shrink.
complete: clothesline would not let our clothes shrink.
Betty always had better rhythm when dancing at the club with Angela because 
OPTIONS:
- Betty was more experienced.
- Angela was more experienced.
Betty was more experienced.
Problem: Continue the following story.

The student tried to store the paper in the folder but the 
OPTIONS:
- paper was too small..
- folder was too small..
Here's how I want to continue it:
folder was too small..