单选题 What is the main idea of the third paragraph?

A、 Geniuses make creations or discoveries in large quantities.
B、 Geniuses can make many achievements without much effort.
C、 Geniuses inevitably experience failures before making a success.
D、 Geniuses may just produce something common and ordinary.

【正确答案】 A

【答案解析】由第三段首句可得出结论。