Which of the following types of commerce could the federal government regulate?
a. an airplane that takes passengers from new york to texas
b. a subway that takes passengers between neighborhoods in san francisco
c. a limousine that takes passengers from one ohio city to another
d. a taxi that takes passengers from downtown chicago to the airport

A. an airplane that takes passengers from New York to Texas

Explanation:

The federal government can and only should Tax airplanes or business that are crossing state frontiers or crossing the country, it can´t tax business that work only in one state, or only in one city, because it doesn´t have the faculty to do so, from this options the only one that the Federal Government could tax is a plane flying from New York to Texas.

c. the king has significantly abused the colonists' rights many times over a long period of time.