1572 * 10⁸ Troy Oz of Silver Were Used in the United

1.572 * 10⁸ troy oz of silver were used in the United States in 1980. How many kilograms is this (1 troy oz = 31.1 g)

A) 4.89 * 10⁶ kg
B) 4.89 kg
C) 5.05 * 10⁶ kg
D) 4.89 * 10¹² kg
E) 5.05 * 10³ kg