1. In her recently published study, Rubin asserts that most women do not suffer from the “empty nest syndrome”; they are, in fact, relieved when their children depart.

(A) they are, in fact, relieved when their children depart

(B) and they are, in fact, relieved when their children departed

(C) they are, in fact, relieved when their children departed

(D) in fact, they are relieved when their children departed（A）

(E) they are relieved at the departure of the children, in fact

why???use depart not departed???