[Q]: How does the sentence end?

Jill was hosting a fancy party and needed to buy only expensive foods. She got matsutake mushrooms instead of apples to eat because the 
OPTIONS:
- apples are expensive.
- matsutake mushrooms are expensive.

[A]: matsutake mushrooms are expensive.
QUES: Continue writing.

The infection that Emily has it is more serious than the one Lindsey has, because 

OPTIONS:
- Emily infection is due to the Ebola virus.
- Lindsey infection is due to the Ebola virus.
+++++++++
ANS: Emily infection is due to the Ebola virus.
Problem: How does the sentence end?

Mary entered the classroom before Kayla was able to because 
OPTIONS:
- Mary arrived at the school earlier.
- Kayla arrived at the school earlier.
Answer: Mary arrived at the school earlier.
sentence: I bought a steel property at the same time as my wooden property. The  OPTIONS:
- wooden property was harder.
- steel property was harder.
complete: steel property was harder.
Tanya showed microscope slides to Rebecca to examine single-celled organisms, as a consequence 
OPTIONS:
- Tanya discovered the wonder of the tiny world.
- Rebecca discovered the wonder of the tiny world.
Rebecca discovered the wonder of the tiny world.
Problem: Continue the following story.

He wanted to treat the bursitis in his knee by using a brace but the 
OPTIONS:
- brace was too tight.
- knee was too tight.
Here's how I want to continue it:
brace was too tight.