Her parents will never give their …… to so much an unsuitable match. A. acquiescence B. consent C. agreement D. willingness

The correct answer is B. consent.

• Acquiescence is a passive acceptance of something, especially without protest.
• Consent is permission for something to happen or be done.
• Agreement is a state of accord or harmony between people or groups.
• Willingness is the state of being ready or eager to do something.

In the given sentence, the speaker is saying that her parents will never give their permission for her to marry someone who is not a suitable match for her. Therefore, the correct answer is consent.