An increase in quantity demanded is causeIf the government should decide to legalize marijuana, all other things remaining the same, we should expect to see Part 2 A. a decrease in the demand for marijuana. B. an increase in the use of imported versus domestic marijuana. C. a decrease in the price of marijuana. D. an increase in the price of marijuana.d by Part 2 A. a change in expectations about price in the future. B. a decrease in the price of the good. C. an increase in income. D. a decrease in the price of a complement