Which best describes the scientists who contributed to our current body of knowledge? a. people of all races b. white males c. europeans d. people from south asia

The correct answer is option A. "People of all races".

Explanation:

Our current  body of knowledge has come from very different and distant places around the world. Therefore, it is sure to state that scientist that contributed to our knowledge correspond to people of all races. An example of this diversity is illustrated by the different Nobel laureates in Physiology or Medicine. The first winner was Emil Adolf von Behring, a scientist from Germany for the discovery of a diphtheria antitoxin. But there are examples from many countries: César Milstein from Argentina, for the principle of production of antibodies; Sydney Brenner from South Africa for programmed cell death; Tu Youyou from China for a novel therapy against malaria; among others.

b. the carbon cycle ensures living things have a source of hydrogen

a community that experiences major changes undergoes progress