请教一题：that vs works

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

A和D，哪个好

D,earlier works 和Blassingame’s innovative study 比较

that of earlier works有不知所云的感觉

agree with D

看来就是D。Thanks，bon，LES，merie。