Carla Wolfe Orders Some Inventory from Supplex Co

Carla Wolfe orders some inventory from Supplex Co. Carla calculates that if Supplex is late in delivery, she will lose about $100 a day in profits. They agree to specify in the purchase order that Supplex will pay Carla $100 a day if late. What is this clause called?

A) Penalty clause
B) Liquidated damages clause
C) Pre-estimated clause
D) Guarantee clause
E) Defeasance clause