Final answer:
Strikes or lockouts that affect the national interest can be declared national emergency disputes true. The necessary and proper clause expands federal power, not limits it, so it is false to say it limits national government power. The market revolution did indeed bring many social and economic changes to the U.S., making that statement true.
Step-by-step explanation:
Strikes or lockouts that have an adverse effect on the national interest may indeed be declared national emergency disputes. This statement is true. Such a declaration allows the President to intervene in labor disputes that could threaten public health, safety, or national security. This intervention could include the implementation of a "cooling-off" period where workers are required to return to work temporarily while negotiations continue.
The necessary and proper clause, also known as the elastic clause, has historically been interpreted to expand, rather than limit, the powers of the national government. Therefore, the statement that the necessary and proper clause has had the effect of limiting the power of the national government is false.
Concerning the market revolution in the United States, it is true that it brought many social and economic changes. This period saw significant transformations including industrialization, increased transportation networks, and rapid social changes as America moved towards a more market-oriented economy.