Which of the following words would not introduce an adverb clause?

a. when
b. where
c. who
d. after

C. who

Explanation:

Adverb clauses' function is to modify or to add more detail to an adjective, a verb or another adverb, so it often answer questions like "Why?", "How?", "When?", "Where?" and "In what circumstances?." But since these clauses do not modify nouns, it can not answer to "Who?" questions or be introduced by "Who." Here are some examples of sentences containing adverb clauses (underlined):

After drinking that much alcohol, I felt sick.

The adverb clause modifies the verb "felt" and it answers the "when?" question: When did you feel sick? After drinking that much alcohol.

When Eli comes home, we always watch series all day long.

The adverb clause modifies the verb "watch" and it also answers the "when?" question: When do you watch series all day long? When Eli comes home.

Your shoes are in the living room, where I told you not to put them!

The adverb clause answers the "where?" question: Where are your shoes? Where I told you not to put them!

after the signature of the treaty of versailles in june 1919, germany lost nearly 25,000 square miles and a population of 7 million people. these territories included eupen-malmedy area and moresnet which were ceded to belgium. regarding relations with france, germany ceded the sovereignty of the saar coal mines to this country, as well as the provinces of alsace-lorraine.

explanation:

in night, why are wiesel and his father evacuated from the auschwitz concentration camp? a massive escape makes the nazis question the security of auschwitz. they are assigned to work as laborers in a factory at another camp, buna. hitler has ordered that all remaining jews be relocated within german borders. the german army needs the camp guards to go to the battle front for a last-chance defense.