What might be the ultimate result of a biased bitter criticism

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

A．explain that staging a play requires complex teamwork
B．argue that a minute mistake may ruin a lifelong task
C．show that the preparatory stage is imperative t the following ones
D．illustrate that criticism may block the way to success