In the nineteenth century,this material became both less costly and more widely available for construction.
A) glass
B) iron
C) concrete
D) steel
E) all of the other answers

Question

Quizplus · Accepted Answer

In the nineteenth century, advancements in production methods made glass, iron, concrete, and steel both less costly and more widely available for construction, revolutionizing the industry and enabling new architectural possibilities.

In the Nineteenth Century,this Material Became Both Less Costly and More