PT 24 S3 Q23

Historians of North American architecture who have studied early nineteenth-century ... ...

Which one of the following, if true, most helps to strengthen the historians’ argument?
(A) More original floorboards have survived from big early nineteenth-century houses than from small early nineteenth-century houses.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Stronger" Questions, Set 3 - Difficult/Uncommon Mix (25Q)