The burden of a proportional tax ________ as a percentage of income as income ________.

At the market equilibrium, when efficiency is attained, the marginal benefit ________ the marginal cost

A) is equal to B) is greater than C) is less than D) has no necessary relationship with E) is equal to the marginal deadweight loss which is equal to

Productivity, or output per labor hour, rises as transportation costs fall

Indicate whether the statement is true or false