James Gadsden was sent to Mexico with several points of negotiation as well as a wide budget. He was authorized to offer Mexico up to $50 million for California and as much as $15 million for the part of northern Mexico that the U.S. wanted for a railroad. While Santa Anna refused to sell California, he was willing to give up a part of Mexico's northern territory.
Santa Anna agreed to sell 45 thousand square miles of land to the tune of $15 million. In addition, the United States agreed to continue doing their best to protect Mexico from Native American attacks, while Mexico agreed to no longer hold them financially liable for any damages. Gadsden and the Mexican president signed this initial agreement on December 30, 1853.
Primary source. is the answer i think
The stock market crash crippled the American economy because not only had individual investors put their money into stocks, so did businesses. When the stock market crashed, businesses lost their money. Consumers also lost their money because many banks had invested their money without their permission or knowledge.
The answer is A because the president is using his veto power to "check" the power of the legislative branch (Congress)
The legislative branch can further "check" the president's power by overriding his veto if they so wanted