The earliest and most enthusiastic proponents of Manifest Destiny were:

A. Investment Bankers
B. Eastern Politicians
C. Northeast Industrialists
D. Southern Proslavery Advocates
E. Protestant missionary groups

I think the answer is B. Is that correct?

The Democrats used Manifest Destiny first to Justify a war with Mexico so I believe the correct answer is B.

I had put b on my test and it was incorrect. A friend out e and got it right. Not sure why though sorry.

To identify the earliest and most enthusiastic proponents of Manifest Destiny, we can break down each option and evaluate their significance in promoting this concept.

A. Investment Bankers: Investment bankers were primarily concerned with financial matters and investing in profitable ventures. While they may have been supportive of the economic opportunities presented by westward expansion, they were not the primary proponents of Manifest Destiny.

B. Eastern Politicians: Eastern politicians, particularly those from states such as New York and Pennsylvania, played a crucial role in promoting Manifest Destiny. Figures like President James K. Polk and Secretary of State James Buchanan were strong advocates for territorial expansion. They believed it was important for the United States to expand its borders and gain more resources and influence.

C. Northeast Industrialists: Northeast industrialists, especially those involved in manufacturing and trade, had a vested interest in expanding markets and securing access to new sources of raw materials. They saw westward expansion as a means to increase profits and expand their industries. So, they were also supporters of Manifest Destiny.

D. Southern Proslavery Advocates: Southern proslavery advocates viewed westward expansion as an opportunity to spread slavery to new territories. They believed in the expansion of slaveholding states and saw Manifest Destiny as a means to fulfill their goals. However, it is important to note that this group's support for Manifest Destiny was specific to their proslavery agenda, rather than a broad endorsement of territorial expansion.

E. Protestant Missionary Groups: While some Protestant missionary groups did support Manifest Destiny, their enthusiasm for this concept was not as widespread or influential as the other groups mentioned. These groups often saw westward expansion as an opportunity to spread Christianity and "civilize" Indigenous populations. However, their support for Manifest Destiny was not as politically or economically motivated as that of the other groups mentioned.

In conclusion, the earliest and most enthusiastic proponents of Manifest Destiny were both Eastern politicians and Northeast industrialists. They were driven by political, economic, and ideological motives, which led to their strong support for westward expansion.