"In evaluating thecolumnist's position," we need to find something either support or weaken the conclusion drawn in the passage. The conclusion says that people should avoid using a certain artificial fat.
A) will tell you whether that DRAWBACK of the fake fact can be compensated for. If YES, people do not need to avoid using the fake fat. If NO, the author's conclusion holds.
-- by 会员 sdcar2010 (2012/1/2 22:02:32)