SEC was an organization created during Roosevelt's New Deal to ensure that stocks were not fraudulent and that they were being traded properly without abuses.
It's D.
Many alchemists wanted to create the sorcerers stone (creates gold according to a legend).
They studied ores to find out more about the world.
Plus, they also wanted to cure diseases with their practice. (To this day you see stone therapy, which is said to be beneficial for your health)
A socialist economy wouldn't work because America was built off of capitalism and like it or not, business feeds a majority of America's economy. Without our strong ties in international business, we would lose monetary relationships throughout the world and our economy would sink.