单选题 It can be inferred from the text that if optimism were adopted, ______.

A、 no serious problems would arise in society
B、 anything could be done wit ease
C、 some social problems could more possibly be solved
D、 people would succeed in getting over all the obstacles

【正确答案】 C

【答案解析】由Faultfinding expends so much negative energy that nothing is left over for positive action可知解决影响社会的实际问题需要勇气和力量。当采取乐观进取的态度时问题可能会更快解决。所以正确答案是C。