For many years, historians insisted that Native American women

For many years, historians insisted that native American women in the 1800s adhered to a rigid vegetarian diet, including roots, nuts and berries. However, a recent study of their remains suggests that this might not be true. Hair samples from a Native American female revealed significant levels of Vitamin D and K, which the human body cannot produce on its own; further the only dietary source of these vitamins is red meat. Therefore, it is likely that Native American women from the 1800s consumed a meat-based diet, rather than vegetarian fare

Which of the following, if true, would strengthen this conclusion the most?

A.A recent nutritional study suggests that the human body can manufacture minute amounts of Vitamin D in frigid conditions.
B.The levels of Vitamin D and K in the hair samples from the Native American female were identical to those from women from Europe who eat a meat-based diet.
C.When the scientists re-ran the analyses on the same samples, they obtained identical results.
D.When scientists examined hair samples from the bodies of several other Native American women, they obtained identical results.
E.Twelve years after the scientists examined the hair samples and published their results, no one has disputed them.

OA and OE coming after some discussion.