Bauman Flooring Found a Supplier of Very Inexpensive Fibers That

Bauman Flooring found a supplier of very inexpensive fibers that could be used to produce low-grade carpeting at a very low cost. Because Bauman had been facing stiff competition in the medium-grade carpet industry, it started using the new material in all of its carpeting and also reduced its prices. This is an example of a(n) :

A) aesthetic modification.
B) line extension.
C) brand extension.
D) functional modification.
E) quality modification.