Answer:
The answer is: A) Declare the law constitutional because Milton's actions substantially affect interstate commerce.
Step-by-step explanation:
The Commerce Clause, Article I, Section 8, Clause 3 of the Constitution of the United States:
[The Congress shall have Power] To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes.
Congress can enact laws that regulate interstate commerce, and this law is an example of one of them. It doesn't matter if Milton's action only affect commerce in a very small way, the law is still constitutional.