Problem: How does the sentence end?

The woman determined the smell in the kitchen was coming from the potatoes instead of the onions, because the 
Answer: Potatoes were rotten.

Problem: How does the sentence end?

When donating blood, I don't look at the needle until I get my cookie, and it's always great to see that the 
Answer: cookie is quite large.

Problem: How does the sentence end?

Amy wore only synthetic fabrics whereas Kayla leaned towards natural ones because 
Answer: Kayla preferred being conscientious.

Problem: How does the sentence end?

They banned the shirts from the venue but allowed the jackets.  The 
Answer:
jackets were considered just right for the occasion.