At a time when it was unusual to do it, Dorothy Sterling wrote about such major figures of
Black history as Harriet Tubman and W.E.B. Du Bois.
(A) it was unusual to do it
(B) it was unusual to do so
(C) doing that was unusual
(D) that was an unusual thing to be doing
(E) it was not usual to do
The OA is B.
Can any expert help me here. I do not understand the "to do so". Why is B?
Black history as Harriet Tubman and W.E.B. Du Bois.
(A) it was unusual to do it
(B) it was unusual to do so
(C) doing that was unusual
(D) that was an unusual thing to be doing
(E) it was not usual to do
The OA is B.
Can any expert help me here. I do not understand the "to do so". Why is B?
