After the breakup of the Soviet Union, nearly every republic moved from a Communist economic system to a "mixed" economy, since they wanted to embrace capitalism but needed to transition from a "planned" economy first.
Except for the statement A, all other statements can be argued to be negative outcomes of the invention of the cotton gin. But in the need to choose only two, the most negative are C and D.
Despite the cotton gin making processing faster, it produced more demand for labor instead of less. The cotton production's radical growth was based primarily on slave labor. Thus:
Statements B and E are negative since the prominence of the United States in the world cotton production, due to a tremendous increase in production, was reached based on a more violent exploration of slave labor.
Statements C and D refer more directly to negative outcomes of the cotton gin. They explain how numbers in statements B and E were achieved. Slave labor was a repudiation of black people's status as humans. It was obtained through continuous violence and torture, and it increased due to the invention of the cotton gin.
The decisions of Congress are heavily influenced by the power of the president. One example would be the power of veto. Even if Congress passes a law in both the House of Representatives and Senate, it does not become a law until the president officially signs it. If the president vetoes (overrules) this law, then Congress must be able to override this veto with a 2/3 vote in both the Senate and House. With this in mind, Congress must ensure before passing the law that if it is vetoed that they would have the power to still make this law possible.
As commander in chief, the president has significant power of the military. Even though Congress needs to approve a declaration of war, they must consider what policies the president will implement once the country is at war.