Broker Knorr advertised in the newspaper that anyone who bought a property listed with the broker would receive a free microwave oven valued at $500. Such action is

A. legal provided full disclosure is made to all interested parties.
B. illegal under any circumstances.
C. legal provided that only a chance to win the microwave in a drawing is actually given to the buyer.
D. illegal since the value of such a gift cannot exceed $100

Answer: A. legal provided full disclosure is made to all interested parties.