Answer:
The first one is C and the second one is C I think
Explanation:
Here are some examples of answers:
1. A song was sung by Rita.
2. A restaurant was opened last year by them.
3. An interesting story was told by granny.
Now use these, and this website: https://webapps.towson.edu/ows/activepass.htm
to help you with the rest.
The way I like to remember it, is to take the first noun and the second noun and switch them, then alter the verb tense and sentence structure to make it make sense.
A microorganism, especially a bacterium causing disease or fermentation.