Answer: A. Word of mouth is a useless data source.
Explanation: Experimentation refers to an empirical procedure or process which is used to validate an hypothesis or establish a fact. However, experimentation requires rules which guides the process, these rules are necessary in other to avoid bias, false conclusions or inference.
According to the options given in the question above, facts used in experimentation should be traceable and reproducible. Word of the mouth is a useless data source as it usually has no empirical basis. Expert opinion or information being established by three or six sources could be considered as a fact.
Korean War, 1950
U2 Crisis, may 1960
Bay of Pigs, 1961
Marshall Plan and Truman Doctrine,1947
Cuban Missile Crisis, 1962
The spread of maize cultivation from present-day Mexico northward into the present-day American Southwest and beyond supported economic development, settlement, advanced irrigation, and social diversification among societies.
Examples: Pueblo, Navaho (Navajo)
the question is incomplete .please read below to find the missing content
What particular agricultural crop helped advance a civilization?
Cultivate Add to list Share. Cultivation is the act of caring for and growing plants. Your desire to grow your own fruits and vegetables in your backyard means that you will engage in some heavy cultivation. Commonly used.
Plowing (or excavating) refers to digging the soil down to a spade depth, burying weeds and debris into the soil, and aerating the soil to avoid compaction. It facilitates the penetration of airborne nutrients and water deep into the soil for plant roots to access.
Learn more about cultivation here
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She repeats it to lessen the connotative power of the word because her audience has ignorant people. She's suggesting that oppressive and superficial description are irrelevant to a person's personality.
