DuBois became a student at Fisk University. After he graduated, DuBois went to the distinguished Harvard University to further his education. The school gave him the opportunity to study in Europe. He was able to travel across the continent and visit some of the top minds of his field. He was so steadfast in his studies that he became the first African American to receive a Ph.D. from Harvard. After school, DuBois taught and worked for many political and civil causes. He then moved to Georgia to start the first sociology department at Atlanta University.

In paragraph 3, the word steadfast means

A) comfortable.
B) committed.
C) efficient.
D) unaware.