Answer: A controlled experiment is the only research method that can establish a cause and effect relationship.
Explanation:
Answer:Clipper Ship, ship with sleek hulls and tall sails that "clipped time from long journeys.
Morse Code, a system for sending messages that uses a series of dots and dashes to represent letters of the alaphabet, numbers, puncuation.
Explanation:
Answer:
Covariation of cause and effect.
Explanation: Covariation of cause and effect implies that when the cause is present(reading the newspaper daily), effect happens afterwards(displaying more knowledge of current events than students who do not read the newspaper daily).
When cause is not present, effect does not happen.
The correct answer is: [C]: "role overload" .
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