PT 49 S3 Q10

Through the last half century, the techniques used by certain historians of African art for judging the precise tribal origins of African sculptures...

The author's primary purpose in the passage is to
(A) classify a set of artistic styles according to a newly proposed set of principles
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: Art & Literature Mix 1