4. Given the information in the passage, Porter’s identification of the ancestry of Duncanson and Johnston provides conclusive evidence for which one of the following statements?
(A) Some of the characteristics defining the Hudson River school are iconographically linked to Weston African partisanship. - "characteristics defining the Hudson River school" are out of scope.
(B) Some of the works of Duncanson and Johnston are not in the style of the Hudson River school. - we don't know about the style of the Hudson River School. Out of scope.
(C) Some of the work of Euro-American painters displays similarities to African-American crafts of the eighteenth and nineteenth centuries. - Euro-American painters are out of scope.
(D) Some of the works of the Hudson River school were done by African-American painters. - ok. As they were the painters of the Hudson River School, and Porter proved them to be of African ancestry.
(E) Some of the works of Duncanson and Johnston were influenced by West African artifacts. - While, in general, the passage talks about "West African artifacts," there is no mention of these artifacts by Duncanson and Johnston. Distortion.