In a busy, modern shipping port, which job might a specialized worker perform to increase trade?
a. off-loading cargo by hand
b. driving yard tractors
c. stacking wooden barrels by hand
d. running a gantry crane

is there multiple choice or do you need like an essay answer?

c

explanation: because you need to reduce the pollution on land,the exhaust fumes will stop,and stop it in water,the oil that is in the oceanharms the fish   sorry if you   have been waiting long  

answer; ewing's sarcoma;