Which one is the correct? Thanks

QUESTION 15 A foreign firm exporting to the U.S. cannot be accused of dumping if 1. It sells its product in the US, at a price below its production costs 2. it sells its product in the US at a price below what U.S firms charge 3. It sells its product in its home market at a lower price than in the U.S. 4. it sells its product in the U.S at a higher price than US firms charge 5 it both imports products to the US and produces products in the US