Answer:
B.) The Northern economy was not threatened because of the secession of the southern states.
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The Plymouth Separatists cooperated with the Puritans who settled the Massachusetts Bay Colony in 1630. Although the Puritans had originally hoped to purify and reform the Church of England, in New England they accepted the congregational form of church government established by the Pilgrims.
The successful attempt to put the satellite Sputnik into space confirmed the fear of the US citizens that the Soviet Union was capable of potentially placing weapons into space (like missile-technology satellites, etc).
