The author believes that ______.A．man can find solutions sooner or later to whatever quest

The author believes that ______.

A．man can find solutions sooner or later to whatever questions concerning nature he can think up

B．man can not solve the problems he can think up because of the limits of human intellect

C．sooner or later man can think up all the questions concerning nature and answer them

D．questions concerning consciousness are outside the scope of scientific research