Answer:
A. adjective clause
Explanation:
The function of the clause is to describe the person; thus, the clause functions as an adjective. An adjective describes a noun or a pronoun.
When you enumerate you need to put comas between all the items except the ones which are connected by "and" : as A is not correct as it does not have comas, and B is incorrect as it has comas where "and" is.
now, in a way both C and D are correct, but C is the usual accepted version, and D is an example of "Oxford coma" (where the coma is optional, to remain on the safe side, choose C).
D) they both had challenged the status quo of poetic expression
To do I think I hope this helps
A. Brainstorming HOPE THIS HELPED.