Answer: SUBMARINE CABLES
Explanation:
Submarine Cables or Submarine Communications Cables were first developed in the 1850s to carry telegraphy information cables laid on the sea bed with the purpose of connecting stations on land.
Modern cables use optic fibre technology to carry telephone, internet (including email) and even encrypted data.
For extra information the submarine cable connecting the United States to Europe is known as MAREA. It is 6600 km long and connects the United States to Spain.
Answer:
They worked to free the serfs
Explanation: They worked to free medieval laborers (aka) slaves
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McCarthyism is the practice of making accusations of subversion or treason, especially when related to communism. The term refers to U.S. senator Joseph McCarthy (R-Wisconsin) and has its origins in the period in the United States known as the Second Red Scare, lasting from the late 1940s through the 1950s.