【单选题】

Maureen radiates an unfailing common sense and good humor, although not a false cheery -------; she has no illusions about life, and her grace comes from her capability to meet it -------.
A．(A) mirth... flinchingly

B．(B) naiveté... head-on
C．(C) insensitivity ... callously
D．(D) charm... promptly
E．(E) ignorance... obscurely