In 1998 paleoanthropologist ricks potts published an article in the yearbook of physical anthropology , peer-reviewed journal .the article was titled "environmental hypotheses of hominin evolution ".which statement would discredit pott's objectivity if it was included in the article ?

a- i believe the human race is capable of great things.
b- the data show that the human population is adaptable
c- the fossil record suggest huge variations in the human population
d- variation allow for the process of evolution