select the most appropriate word to fill in the blank. She returned the book after she ______ it. (a) reads (b) read (c) had read (d) was read

Options

A. reads
B. read
C. had read
D. was read

Explanation

had read
RULE: We use the Past Perfect to show that something started in the past and continued up until another action in the past.
`2^(nd)` action (Simple past) after `1^(st)` action (past perfect)
In the given sentence, “after” should be followed by “had read”