The correct answer is discuss terms.
A. set free
B. discuss terms
D. entertain others
The correct answer is (B) To discuss terms (with enemy); to confer (especially to discuss peace terms with an enemy); to hold an informal conference with an enemy under a flag of truce.
Parley comes from French parler (to speak).
Examples of use:
- He concluded that it was time to parley with the opposing commander.
- There was a break in hostilities while the two generals parleyed.