Producers will supply an inefficiently low quality of a good if the government imposes: an excise tax.
a price control.
a binding price floor.
a binding price ceiling.

A binding price ceiling

Explanation:

A binding price ceiling is a situation when the government force the producers to put the price of their product below the equilibrium price.

When being forced into a situation, most of the producers will find some other way to maximize their profit beside raising the price. This will most likely make them reduce the quality of materials that used to produce the goods. This will lower the capital needed for the production and increase the profit. But in return, the supply will be inefficiently and have low quality.

answer; i believe the correct answer is (a) purchase of treasury stock;