Final answer:
Non-tariff barriers (C) refer to rules, regulations, inspections, and paperwork that make it more costly or difficult to import products, other than import duties.
Step-by-step explanation:
The term used to describe discrimination against imports other than import duties is non-tariff barriers (C).
Nontariff barriers refer to all the rules, regulations, inspections, and paperwork that make it more costly or difficult to import products. This can include safety standards, rules-of-origin regulations, and other measures that limit imports in ways other than tariffs. For example, a rule requiring certain safety standards can effectively limit imports just like high tariffs or low import quotas.