Answer:
a. He must only sell new mobile homes.
Step-by-step explanation:
Mobile homes are those homes which are built before the year 1976. these homes are built with less safety standards when compared to manufactured homes.
In the context, Michael Hagans is a real estate broker of La Mesa. While making a plan to sell mobile homes, according to the California Housing department, it is not mandatory to sell only new mobile homes.
Hence the correct option is (a).