Answer:
C
Explanation:
I guess because there isn't any sign of biasness? Lol
A seven letter word containing thousands of letters - a mailbox.
The word mailbox has 7 letters, and it contains thousands of letters - just not the letters from the alphabet, but rather a form of a paper message.
C. performers
Comedians, actors, and musicians all fall under the umbrella of being a performer in some way, making this the most general category here!
