Problem: How does the sentence end?

Tanya was able to see the signs, however Jessica could not due to 
OPTIONS:
- Tanya great eyesight.
- Jessica great eyesight.
Answer: Tanya great eyesight.
sentence: Donald had never taken typing lessons, while Kevin had, so  OPTIONS:
- Donald was slower at transcribing documents.
- Kevin was slower at transcribing documents.
complete: Donald was slower at transcribing documents.
The brush james bought could not get the stain off his teeth because the 
OPTIONS:
- brush is too soft.
- stain is too soft.
brush is too soft.
Input: Continue writing.

Kevin always keeps track of his bills and payments but not Christopher because 
OPTIONS:
- Kevin is organized.
- Christopher is organized.

Continued: Kevin is organized.
Story needs to be completed:
Rachel wasn't good at Science like Betty.  
OPTIONS:
- Rachel failed the big science exam that was needed to go onto next grade.
- Betty failed the big science exam that was needed to go onto next grade.

My choice:
Rachel failed the big science exam that was needed to go onto next grade.
Problem: How does the sentence end?

Emily was having trouble opening the champagne bottle when Elena offered to help, so 
OPTIONS:
- Emily opened it.
- Elena opened it.
Answer:
Elena opened it.