It's missile defense, so I'd say C.
Answer;
Radio networks
Explanation;
-Magazines were america s only national medium from the 1890s until the 1920s when radio networks was/were established.
-Radio network became an accepted commercial medium during the 1920s. Initially many thought it was too intrusive a medium to allow advertising, as it entered people’s homes by the end of the decade, advertising had become an integral aspect of programming.
<span>D. the collapse of the U.S. stock market
During this time, the stock market crashed and the economy fell apart. People overwithdrew from banks, which also slowed to a draw.</span>
I think its true (Governor is is in charge of the state and laws)
The main way in which the concepts of racism and social Darwinism relate to imperialism is that they were used by colonizers to justify their actions, especially in places like Africa, where they argued that because the Africans were so "behind" the Europeans, they were allowed to impose their will.