Question

Which of the following foods do not support bacterial growth raw carrots cooked rice onions or refried beans

Answer 1

Onions. That's why they can be used to ward off "evil spirits" in the medieval times, which in this case is actually bacteria/

Answer 2

I'd say onions because I've never seen or heard of onions having bacterial growth. Of course this is only my own opinion and thought so please feel free to correct me.