It is now necessary for the United States to import _____ of the 24 most important nonrenewable mineral resources.

It is now necessary for the United States to import _____ of the 24 most important nonrenewable mineral resources.

It is now necessary for the United States to import _____ of the 24 most important nonrenewable mineral resources.



a. 25%

b. 33%

c. 50%

d. 67%

e. 75%








Answer: C