It is the mark of an educated mind to rest______with the degree of precision which the nat

It is the mark of an educated mind to rest______with the degree of precision which the nature of the subject______and not to seek exactness where only an approximation is possible.

A．satisfiedly … admits

B．convivially … assumes

C．fitfully … allows

D．contentedly … rejects

E．sporadically… entails

请帮忙给出正确答案和分析，谢谢！