7622. He declined to speak about the problem when I asked him.

✅ The correct answer is option C.
Agreed : discussed or negotiated and then accepted by all parties.

Promised : assure someone that one will definitely do something or that something will happen.

Refused : indicate or show that one is not willing to do something.

Permitted : officially allow (someone) to do something.

Declined : politely refuse (an invitation or offer).

Synonym of Declined is Refused