[Q]: How does the sentence end?

Emily knew exactly how to read the expressions on Jessica's face, because 
OPTIONS:
- Emily was very observant.
- Jessica was very observant.

[A]: Emily was very observant.
QUES: Continue writing.

Following the advice from the chef, Mary used a wooden cutting board to cut meat instead of a plastic cutting board, even though the 

OPTIONS:
- wooden cutting board is nonporous.
- plastic cutting board is nonporous.
+++++++++
ANS: plastic cutting board is nonporous.
Problem: How does the sentence end?

The carpenter used the nails on the walls and not on the doors, because the 
OPTIONS:
- doors were wobbly with them.
- walls were wobbly with them.
Answer: doors were wobbly with them.
sentence: Emily sanded, painted and sealed the outdoor patio furniture for Kayla since  OPTIONS:
- Emily was able-bodied.
- Kayla was able-bodied.
complete: Emily was able-bodied.
Jane was late for a court case at 4:30 so she rode the subway thankfully the 
OPTIONS:
- subway was delayed.
- case was delayed.
case was delayed.
Problem: Continue the following story.

His doctor said his diet should include vegetables and not donuts because the 
OPTIONS:
- vegetables are beneficial.
- donuts are beneficial.
Here's how I want to continue it:
vegetables are beneficial.