Sentence Correction

Unlike that of earlier works on slavery, Blassingame's innovative study relies not on the
records of White slave owners but on the records of the salves themselves, especially the
70 or so autobiographies and memoirs that have been preserved.

A. that of earlier words on slavery, Blassingame's
B. that of earlier works on slavery, Blassingame in his
C. earlier works on slavery, Blassingame in his
D. earlier works on slavery, Blassingame's
E. the earlier works on slavery, Blassingame in his

OA D