I believe the answer is D
Dorothy Vaughan had six children, so it was really hard to commit to them and science at the same time. But this reconciliation was, in her case, a philosophical matter of private and public interest. What she did as a scientist helped her children too, just like so many other children, and humanity in general. As a mother, she naturally missed her children and wanted to spend more time with them; but she had this other mission as well, which was even more important, in terms of humanity.
Well without a description om shooting in the dark. But id assume that the answer is Trench Warfare. Since A- was around since contact with Native Americans and largely popular in North America. B- Only was used and discovered in WW2. And C- was used but was largely frowned upon and condemned by both sides.<span />
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Among the problems that militarism causes we can cite the idea that guns are the solution to any political impasse. Thus, any problem of frontier, territorial dispute or diplomatic discussion can lead (as it did in the last century) in armed conflicts. Countries were less likely to use diplomacy to solve conflict.
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idek sorry bout that hope u find someone who know in 2019
