"b. An atom is solid material" would be an example of something that is now considered scientifically inaccurate, since we now know that the atom is actually mostly open space.
The Spanish-American War was notable not only because the United States ... Spain had dominated Central and South America since the late fifteenth century. ... of additional naval bases in the Pacific Ocean, reaching as far as mainland Asia. ... best known part of the battles, but in fact, several African American regiments
(B) A fort was established and many were killed by disease.
After Lewis and Clark's expedition, the people of mandan village were faced by a devastating outbreak of smallpox disease in the year 1837, as much as the epidemic was devastating it played an important role in uniting the surviving people in Mandan and Hidatsa village who later interacted in trade farming and hunting