Philosophical problems arise when people ask questions that though very have certain ch

问题补充：

Philosophical problems arise when people ask questions that, though very , have certain characteristics in common.

A. diverse

B. relevant

C. abstract

D. consistent

答案：

(答案→)A. diverse

B. relevant

C. abstract

D. consistent

解析：形容词辨析。A多种多样的；B有关的；C抽象的；D一致的；句意：当人们询问那个问题的时候，哲学的问题就出现了，虽然哲学的问题很多种多样，但是却有一些共同之处。根据句意说明A正确。