The Stolper-Samuelson theorem indicates that given certain assumptions and conditions:
A.
a. the real return to the factor used intensively in the import-competing industry will rise in the long-run.
B.
b. the real return to the factor used intensively in the export industry will fall in the long-run.
C.
c. the real return to all the resources in an economy will increase.
D.
d. the real return to the factor used intensively in the export industry will rise in the long-run.