D because he created a cabinet which I'd still used, he set the limit of 2 terms of 4 years each so he did many things that presidents still do
One way that a few firms can gain some control over their market is by secretly cooperating with one another to agree on certain things that wouldn't be obvious to the normal eye.
Upton Sinclair believed that governments should intervene and become more socialistic. This is because he was a known socialist who believed that if left unchecked by the government, the capitalist machine would go out of hand and would bring tyranny to people, which was seen in his Jungle.