Answer:
b
Explanation:
this type of ending comes from Latin .The language did not use s for its endings in plural nouns, most ended ae .
I learned this in U.S. History Class when they got caught by Nazis. They escape to Sweden.
Primary because it is the original direct source, it isn't a writing, or a biography, it isn't coming from a second source.
Is the question asking about what is the meaning of Trepidation?