If One Tracks the Prices of Critical Metals, Like Lead

Multiple Choice

If one tracks the prices of critical metals, like lead, zing, and copper, one sees that

A) they have risen more slowly than the general rate of inflation.
B) they have risen about as rapidly as the general rate of inflation.
C) the prices have fallen, indicating that consumers have found other alternatives.
D) the prices have fluctuated too wildly to conclude anything.