Problem: How does the sentence end?

She preferred brushing her teeth with the manual toothbrush rather than the electric toothbrush because the 
OPTIONS:
- electric toothbrush was advanced for her.
- manual toothbrush was advanced for her.
Answer: electric toothbrush was advanced for her.
sentence: The backpack Benjamin had bought for Dennis was the present  OPTIONS:
- Benjamin had picked out for him.
- Dennis had picked out for him.
complete: Benjamin had picked out for him.
She replaced all of the old kitchen knives with new knives, because the 
OPTIONS:
- old kitchen knives were sharper.
- new knives were sharper.
new knives were sharper.
Input: Continue writing.

Maria could do more advanced skateboard tricks than Megan because 
OPTIONS:
- Maria was a master at the sport.
- Megan was a master at the sport.

Continued: Maria was a master at the sport.
Story needs to be completed:
Natalie became much weaker than Betty after 
OPTIONS:
- Natalie spent a year in the gym doing strength training.
- Betty spent a year in the gym doing strength training.

My choice:
Betty spent a year in the gym doing strength training.
Problem: How does the sentence end?

Tanya was better at converting Fahrenheit to Kelvin compared to Rebecca, so the teacher congratulated 
OPTIONS:
- Tanya .
- Rebecca .
Answer:
Tanya .