【单选题】

There was little to suggest Popper' s future eminence until he came within the ______of the Vienna Circle, the renowned group of philosopher-scientists whose ______was to replace traditional metaphysics with the clean worldview of modern science.
A．(A) ken… wisdom

B．(B) ambit … mission
C．(C) control… caprice
D．(D) sphere… downfall
E．(E) sights… ancestry