The Amount of Aluminum on the Earth Today Relative to the Amount

The amount of aluminum on the earth today relative to the amount 100 years ago when Al was first commercially extracted from bauxite,an aluminum containing ore,

A) is essentially the same.
B) is decreasing rapidly due to production of aluminum beverage containers.
C) is decreasing, but more slowly recently due to interest in recycling.
D) is actually increasing due to recycling efforts and more energy efficient production methods.