Reading Comprehension (RC) | Re: In 1994 a team of scientists led by

HelloGMATNinja

i Refered to the following sentence: "McKa y’s team has demonstrated that the concentration of PAHs increases as one looks deeper into ALH84001, contrary to what one would expect from terrestrial contamination." and chose D

if concentration increases than it is from MARS, if contrary ---> if concentration decreasses, that means