The only mineral that was available in any significant quantity in colonial America was:
a. Gold.
b. Silver.
c. Iron.
d. Coal.
Question 2
Between 1860 and 1910, value added by the top ten manufactures roughly
a. doubled.
b. tripled.
c. increased by 500 (a factor of five).
d. increased by 1000 (a factor of ten).