It's a normal part of life but it really sucks when it happens.
B. It shows where the previous sentence's information is from.
1,2 and im not sure about 4.
W.E.B. Du Bois was the first African American to receive a Ph.D. from Harvard University in 1895
Dialogue always adds another element, or, a level of depth, to any piece of writing. In an autobiography, one is writing about their <em>own </em>life. Adding dialogue will include a whole nother dimension to the bio. =)