Question

During the 19th century, Charles Dickens ______ one of the most famous British novelists.

Answer 1

I believe the answer is "became"

Answer 2

The correct answer is D) had become
This is because, if you say each answer choice out loud with the rest of the question, you can easily identify which answer choice fits best. Also, you should analyze the text for any context clues to help you find the answer.