Advertising companies used to get their message out to a wide audience in the 1920s.

broadcast houses

billboards

automobiles

none of the above

B.) Billboards

Explanation:

Companies have been using advertising to promote their products for centuries now, it has evolved and changed with society and technologies. In the 1920's automobiles were not common in most places, and while radios were on the raise most houses still did not have one, therefore the easiest way for a company to reach a wide audience was through billboards, because they could be placed in strategic locations where there was a higher transit of people and therefore, it could be seen by a lot of them.

the answer is: c. c.it limited the president’s power to start wars.

the war powers resolution of 1973 requires the president to notify the congress whenever the president wanted to order a military operation to other countries within 48 hours. if after being reviewed the congress disagree with the proposal, that the president will be banned from ordering the operation.