51. Which country is the largest producer of gold in the world?
A) China
B) Australia
C) United States
D) South Africa
52. Which country is the largest producer of silver in the world?
A) Mexico
B) China
C) Peru
D) United States
53. Which country is the largest producer of platinum in the world?
A) South Africa
B) Russia
C) United States
D) Canada
54. Which country is the largest producer of copper in the world?
A) Chile
B) China
C) United States
D) Peru
55. Which country is the largest producer of zinc in the world?
A) China
B) United States
C) India
D) Australia