The answer is the North Vietnamese took over the South Vietnam spreading communism Southward and this proved the domino theory (if one country come under the influence of communism, the surrounding countries would follow).
Portugal with arrival of Columbus in 1492
<span>The adventurers is the correct answer </span><span />
Malthus believed that if a population is allowed to grow unchecked, people will begin to starve and will go to war over increasingly scarce resources, also <span>Malthus cautioned that in order to avoid catastrophe such as famine and war, people should enact deliberate population control, such as birth control and celibacy.
So I believe the answer would be D. Having fewer children means more food is available to meet the needs of the population.</span>