Which sentence contains an interjection?

Question

A.
Aha, I’ve discovered the secret door.

B.
Carla, would you please move over?

C.
Both egrets and herons nest here.

D.
How can we best solve the problem?

Answer 1

http://www.chompchomp.com/terms/interjection.htm

Let us know what you decide.

Answer 2

It’s A

Answer 3

what are all the anwsers