A broker learns that one of the licensees under his supervision, and the owners of a listed property, have worked out a scheme to withdraw a property from the market whenever a showing is requested by any buyer who seems to be from a foreign country. What is the most important action for the broker to take in this situation?

Within the relevant range, if there is a change in the level of the cost driver, then a. total fixed costs will remain the same and total variable costs will change b. total fixed costs will change and total variable costs will remain the same c. total fixed costs and total variable costs will change d. total fixed costs and total variable costs will remain the same