The "ceteris paribus" clause in the law of demand allows which of the following factors to change?

A drug dealer earned $85,000 during a year by selling illegal drugs. His income will:

A) cause the GDP of his country to increase. B) not affect the calculation of his country's GDP. C) cause the GDP of his country to decrease. D) lead to an increase in his country's exports.

When the benefit of another hour of work is greater than the opportunity cost, we would expect the worker to work:

A. another hour. B. an hour less. C. exactly that amount. D. Cannot be determined without more information.