What is different about selfish and non selfish people that explains why one harm others while others won't ?

Which of the following best explains what market forces are? a. the properties of a free-market system that determine what the outcomes will be. b. the decisions of the government that decide what will be produced. c. the ways that producers coerce consumers into buying at the highest price possible. d. the laws that govern whether a producer will be able to buy low and sell high.