PLS HEL[P ME
Which of the following was an effect of the discovery of gold and silver on western development?
A. It caused a Sharp Decrease in the population of eastern cities
B. There was no longer a need for the railroad
C. The value of gold and silver decreased
D. It Contributed to the opening of the western frontier.
I think the answer would be c. considering gold in the west is often found., But In d. it said to help the production so why not use that to contribute to it.