What is Compelling?
A.) noun
B.) verb
C.) adjective
D.) other

Compelling, as it it written, is more descriptive (adjective). For example,
“That play was ever so compelling.”
What is the word doing there? It’s describing the noun/subject : the play.

On the other hand, you can compel someone to do (or not do) something, say (or not say) something. For example,
“I really wanted to go away for college and live in a dormitory, but my grandmother compelled me to stay home and commute.”

You see, it’s all about how it is written. If the question is asking you in the very LITERAL sense what part of speech the word is, you might have to look closely how it’s spelled, what it’s suffix is, and put it in a sentence that makes sense to you.

Another example would be (of the same sentence, but as an adjective): “I really wanted to go away to college and live in the dorms, but my grandmother was so compelling; convincing me to stay home and commute.” In that case - it’s back to adjective, because compel is adding the -ing (also the extra l for proper spelling).

Bottom line: a word can be a different part of speech and play a different role in a sentence, just by how it’s spelled!

Any other grammar questions, let me know! It’s my best subject indeed.

Also, if this helps - please give me my first Brainliest answer, if you will? Thanks kindly!