Answer: The supply of plastic will decrease.
Step-by-step explanation:
Supply simply means the amount of goods and services that a seller is willing to sell at a particular price and a given time period.
It should be noted that one determinant of supply is cost of raw material. Since there's an increase in the price of crude oil which is used in making plastic, there'll be a reduction in the number of plastic that can be produced, therefore, the supply of plastic will reduce.