how does the modern study of history challenge earlier historians

Aby recognizing that they are not useful sources
Bby rewriting them using modern languages
Cby categorizing them
Dby questioning whether their source is reliable

Verified Answer :

One way in which the modern study of history challenges earlier historians is "D) by questioning whether their source is reliable," since many ancient historians used to use very questionable evidence as sources--sometimes they wouldn't use any sources at all.