As a general rule, when there are specific factors, owners of factors specific to the importing industry are $\_\_\_\_\_\_\_\_\_\_\_\_\_\_,$ whereas owners of factors specific to export industries are $\_\_\_\_\_\_\_\_\_\_\_\_\_\_.$

a$.$

not affected; harmed

b$.$

benefited; harmed

c$.$

unemployed; hired

d$.$

harmed; benefited