All of these are ways a society can improve its productivity except

I believe the answer is : Regulation

Regulation is made by the government if it want to limit a certain activity made by the people. Even though regulation might give positive benefit for the environment or the consumers, If the regulation is seen from a business point of view, it would become a hindrance for the businesses and prevent it from obtaining maximum production.

answer'; i believe the correct answer is (15,000) workers a year are treated for injuries caused by jacks, lifts or jack stands;