8. If worker A earns more in wages than worker B, it could be because:
a. The product made by worker A sells for a higher price than that made worker B
b. Worker A uses more capital per worker than worker B
c. Worker A has more natural ability than worker B
d. All of the above
a. The product made by worker A sells for a higher price than that made worker B
b. Worker A uses more capital per worker than worker B
c. Worker A has more natural ability than worker B
d. All of the above