4 单选 (4分)-|||-设函数 =ln dfrac (sqrt {{x)^2+1}}(sqrt [3]{x+2)}(xgt -2), 则 '(0)=-|||-A. -dfrac (1)(6)-|||-B. dfrac (1)(6)-|||-二 C. dfrac (2)(3)-|||-D. -dfrac (1)(3)