Which statement is true about the relationship between a monopoly and its competition in a market?

The answer   would be that "a. monopolies are formed when they buy out their competition in a market," that is true about the relationship between a monopoly and its competition in a market, since monopolies greatly reduce competition. 

Sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532. i found this information on wikipedia