Question

Changing an –um to an –a to form a plural comes from __________.
A.
Latin
B.
Greek
C.
French
D.
Italian

Answer 1

I believe that change would be from Latin origins. Let's take the word addendum. It means something that is added. If you replace the suffix um with a, it means multiple addendums. For future questions, you should try this dictionary: http://etymonline.com/index.php

It's useful for figuring out the original language of words.