What does "be discontent with our current comfort zone" （Para. 3)mean？A．Be prepared to rea

What does "be discontent with our current comfort zone" (Para. 3)mean？

A．Be prepared to realize our dreams.

B．Keep dreaming of unrealistic goals.

C．Picture our dreams clearly and vividly.

D．Be dissatisfied with our present life.

请帮忙给出正确答案和分析，谢谢！