【单选题】

Which of the following best summarizes the main idea of the passage

A．It is farming that gives human beings enough leisure time for sporting activities.

B．Farming is very important in human civilization because it saves human beings from risks and uncertainties of hunting for survival.
C．It is hunting that provides human beings with much simpler ways of obtaining meaty meals.
D．Sporting activities satisfy the desire of modem men to exercise hunting skills which his forefathers developed for survival.