Is the sentence compound, or is it simple with a compound verb?
we fixed the broken toy with glue, but it broke again after a few minutes.
a. compound sentence
b. simple sentence with a compound verb
i choose b

A compound sentence is a sentence that is composed of two independent sentences joined by a coordinating conjuction. Our sentence is a compound sentence (sorry, It's a...)

the two sentences are:
1.We fixed the broken toy with glue
2.it broke again after a few minutes.

and the conjunction is "but"

I believe the correct answer from the choices listed above is option C. The type of communication that is unique because there is a distance between the speaker and the audience would be public speaking. For this, you clearly are away from your audience since they are many and you have to stand in front of all of them and speak. Hope this answers the question.