What is the tense of the underlined verb?

The back door squeaks when someone opens it.

A. present progressive

B. past progressive

C. simple present

D. simple past

A

Explanation:

It can happen at any time.

Progress means "forward or onward movement toward a destination". -Google

That means that the verbs can happen any time.  "The door creaked," would be simple past.

Simple present would be, "Opens the door and it creaked".

This shows that it happened now, but only once.

For past progressive, I have no idea.  Maybe it's, "Opened the door and it creaks."  

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