Why was theodore roosevelt known as the trust buster?

Based on this graph, it is reasonable to assume that by 1930 the percentage of the population with the right to vote was

In shifting to a defense policy based upon the concept of "flexible response," president kennedy was indicating that he had grave doubts about thevalue of which previous defense policy? a massive retaliationb collective securityc containmentd air power

How do private property rights serve as an incentive in a free enterprise economy ?