Answer:
a. providing benefits for veterans
d. building the interstate highway system
Step-by-step explanation:
American post-war economic boom was given mainly because people had money to spend, which had saved up during the war. Therefore, they started buying automobiles and houses . Furthermore, demand overcame supply, so production increased. Not only that, but the Cold War contributed making America demand greater defense spending, which employed more people. Finally, foreign aid programs like the Marshall Plan increased exports.