If the price of a resource increases, other things constant, less of that resource will be hired: it makes other resources look expensive as well b.

If the price of a resource increases, other things constant, less of that resource will be hired: 

a. it makes other resources look expensive as well

b. producers will substitute away from that resource

c. producers fear starting a trend toward higher resource prices

d. the demand curve for the product will shift to the left

e. highly paid resources don't produce as much