Answer:
D. The approval of protective tariffs on manufactured goods.
Explanation:
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the answer to this is c i hope i helped
C. To protect travelers on the Silk Road
The changes to the Social Security Act in 1939 allowed for a larger amount of people to receive benefits from this system (Letter A). The amendments made to this act allowed for family members to receive survivor benefits. For example, if there was a person who paid into Social Security and passed away immediately, their family members (like a spouse or child) would be able to receive money from the Social Security system.
Along with this, retired individuals could also set up payment so that their spouse or children receive money as well. These changes in Social Security help to turn this system into one where several members of the family benefit, rather than just the retired or elderly individual.
Answer: In the late 1800s, experiments using cathode ray tubes led to the discovery of electrons