Gold Rush

Gold has been used by humans for thousands of years, and in ancient times, it was used to make jewelry, cups, and other utensils. Most gold is mined from South Africa, which has the largest deposit in the world.
In some places, gold is mined by blasting or drilling out the rock around the gold. The gold has to be refined before it can be used, and flotation is one method used for refinement. Chemicals and air are added to the gold, and tiny pieces of gold attach to the air bubbles. The bubbles float to the top of the chemicals, and the gold can be removed. Cyanidation can also be used to refine gold. In this method, cyanide and zinc are added to the gold, and the gold is separated from other materials.
Today, gold is mostly used to make jewelry, but it is also used in electronics and electrical industries. A small percentage of the gold mined today is used to make a type of glass called purple of Cassius. This glass is placed on the windows of office buildings to keep the buildings cooler.

Which sentence plagiarizes paragraph 2 of this passage?
A.
Office building windows are kept cooler by applying purple of Cassius (Norville 94).
B.
South Africa's deposit makes it the source of most of the world's gold (Norville 94).
C.
Today, a large percentage of mined gold is used in making jewelry (Norville 94).
D.
The bubbles float to the top of the chemicals, and the gold can be removed (Norville 94).