The answer is A. Selflessness
The 2nd one is the correct answer based on the question's topic
Explanation:
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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.