Churchill is reliable as a primary source, but not as a historian.
**DO NOT type that link it will hack whatever device you are on.
The main result of the Supreme Court decisions in McCulloch v. Maryland and Gibbons v. Ogden was that the federal government was allowed to continue to exercise its power to regulate interstate commerce over the states.
B. With less gas, it became more expensive, and harder to get
Im going to say It is A i hope this helped!