What Is Likely to Happen to the Supply of Firemen

What is likely to happen to the supply of firemen as building codes change to require firewalls and sprinklers to be included in all new construction?

A) The supply of firemen will fall because there will be fewer fires.
B) The supply of firemen will increase because there will be fewer fires.
C) The supply of firemen will remain unchanged because the supply curve relates the number of fire fighters to the wage, not to the number of fires.
D) The supply of firemen will increase as long as wages paid to workers on new construction projects is also increasing.
E) The supply of firemen will decrease as long as the property tax-base increases when the new construction projects are completed.