The interstate highway system was authorized by the federal aid highway act of 1956 for the primary purpose of

The Interstate Highway System was authorized by the Federal-Aid Highway Act of 1956 for the PRIMARY purpose of helping strengthen our national defense by creating an easier means of transporting people and goods in an emergency.

The Interstate Highway System, oficially called the Dwight D. Eisenhower National System of Interstate and Defense Highways constitutes a network of controlled-access highways that are part of the National Highway System in the United States. Its construction was authorized by the Federal Aid Highway Act of 1956.

i actually have a suggestion instead of an answer, how about next time instead of spending the time to time up the question you take that time and try to figure something out for yourself, do you understand?

explanation:

leave a 5 star and a and brainliest answer if you understand, hope this betters you day, or not i don't really care either way. xd

they supported black codes so the answer is a or b