Final answer:
Companies avoid anti-dumping laws by exporting through third countries, which helps them bypass tariffs and regulations that would otherwise apply to their products if shipped directly from their own country.
Step-by-step explanation:
An approach used by companies to avoid anti-dumping laws is exporting through third countries. Companies might use this method to bypass tariffs and regulations that have been applied to their country or products by using third-party countries that aren't subject to the same rules. Price discrimination and dumping themselves are not methods to avoid anti-dumping laws; in fact, they can be the cause for these laws to be applied. Therefore, the correct answer to which approach is used to avoid anti-dumping laws is exporting through third countries.