where did all the people go?

what type is the sentence above?
a.
complex sentence
b.
interrogative sentence
c.
compound sentence
d.
imperative sentence

Imperative Sentence

Explanation:

Share a Wish or Request – This type of imperative sentence shares polite wishes and requests with someone, such as, “Have a good day!” Offer an Invitation – This type of imperative sentence extends an invitation, such as, “Please join me for dinner tonight.”

- "there are several movements that doris lessing was associated with. first of all, communism. she pursued her communist beliefs and included them in her writing, and was also a member of several communist book clubs. she is also strongly associated with feminism, her fight for equality and women's rights.

doris lessing is the kind of writer who has followers, not just readers. they have been engaged to her chiefly because of her involvement in major problems, such as politics and woman-ism."