The correct answer is B) the U.S. bombing of North Vietnam had been ineffective.
<em>Robert McNamara´s change in policy regarding the war was influenced by a defense study that found that the U.S. bombing of North Vietnam had been ineffective.
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Robert S. McNamara (1916-2009) was the Secretary of Defense during the U.S.-Vietnam War. During his tenure, McNamara thought that the U.S. Army had to be prepared to fight the war in any conditions, so he reorganized the United States defense program.
In 1967 he ordered a study of the role of the U.S. in Vietnam. The document was known as “The Pentagon Papers.” Disillutioned by the war results, he resigned in 1968.
A major change in how people worked from pre-Industrial Revolution times to post-I.R. times was that workers who were forced to work longer hours for lower wages fueled a strong movement to unionize. Thus, option 'C' is the correct option.
<h3>What was the major change during the Industrial Revolution?</h3>
The process of transition in modern history from an agricultural and handicraft economy to one dominated by industry and machine production is referred to as the "Industrial Revolution." The development of tools to replace hand tools, the use of steam and subsequently other forms of power, and the adoption of the factory system were the three most significant breakthroughs that led to the Industrial Revolution.
The last third of the 18th century saw the majority of the invention of the machines that brought about the Industrial Revolution. However, a few discoveries from earlier in the century paved the way for later machines. James Hargreaves, a weaver, patented his spinning jenny in 1770, which was the first time multiple spinning was used in practice.
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Much like many other countries, the US foreign policy was based in isolationism which resulted in new restrictions on immigration and a lack of membership in international organizations. There isn't a good explanation as to why it was isolationist in the first place besides the fact most countries were at that time so it made it easier for the US to do the same.
4th option if not then i’m sorry
Explanation:
An oligarchy is where a small group of wealthy people run the government.
