whAt DoEs thE Author imply ABout thE usE oF wAllpApEr BEForE 1730
A．wAllpApEr sAmplEs AppEArED in thE ArChitECturAl mAnuAls.
B．wAllpApEr wAs thE sAmE Color As thE wAll pAints usED.
C．wAllpApEr wAs not usED in stonE housEs.
D．pAttErnED wAllpApEr wAs not wiDEly usE