Answer:
The correct answers are letters "B", "C" and, "D":
B) They cause imports to decrease.
C) Countries usually raise tariffs in retaliation.
D) Exports often decrease.
Step-by-step explanation:
Protective tariffs are taxes imposed on the import of certain products in order to protect the domestic manufacture of the same good. This action will cause the imported products to be more expensive since there are more taxes to be paid. After a period of time, those imported products will decrease in quantity but, in retaliation, the exporters will pass tariffs to the country that originally started to place them. This cycle will cause exports to slow down as well.