Which clause in this sentence is used as an adjective?

When Beowulf arrived, the Danes welcomed him, for they desperately needed someone who could stop Grendel.

A. When Beowulf arrived

B. the Danes welcomed him

C. they desperately needed someone

D. who could stop Grendel

D ??

Yes. D is right.

Thank you

You're welcome.

The clause used as an adjective in this sentence is "who could stop Grendel."

To determine the clause used as an adjective, you need to identify the clause that modifies or describes a noun in the sentence. In this case, the noun being modified or described is "someone." The clause "who could stop Grendel" describes the type of person the Danes needed - someone who had the ability to stop Grendel.

Therefore, the correct answer is (D) "who could stop Grendel."