Which sentence contains an interjection?

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?

what are all the anwsers

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

Let us know what you decide.

It’s A

The sentence that contains an interjection is option A: "Aha, I’ve discovered the secret door."

An interjection is a word or phrase that expresses strong emotion, surprise, or sudden feeling. In this case, the word "aha" in option A is an interjection because it expresses surprise or excitement at discovering the secret door.

To identify the interjection in a sentence, you can look for words or phrases that are not grammatically connected to the rest of the sentence and that convey strong emotion or sudden reaction. In this case, the standalone use of "aha" in option A makes it clear that it is functioning as an interjection.