Dalynda and Phillip have a contract that Phillip will play at Dalynda's opening night reception. The night of the concert, Phillip refuses to go on stage unless Dalynda agrees to pay an additional $5,000 for him to perform. This is known as .

This is known as Economic Duress

Explanation:

Economic duress in contracts is said to occur when a party to a contract threatens to cancel a contract unless the other party involved agrees to their demands. Phillip refusing to go on stage unless he is paid an additional $5000 put Dalynda under economic duress as that was an abrupt decision made by Phillip just at the very minute when his service was needed the most.  

it should be d or b but i'm sure it's d