I believe that the answer is b
Because they do not have any difference between any gender and everyone is treated the same
If you're talking about Pearl Harbor the attack led to America joining the Allies and the end of American isolationism.
The diary of Louis and Clark, or Louis and Clark's adventures through out the Louisiana purchase land, with Sacagawea
Cell theory. In biology, cell theory is a scientific theory that describes the properties of cells, the basic unit of structure in every living thing. The initial development of the theory, during the mid-17th century, was made possible by advances in microscopy; the study of cells is called cell biology.