The correct option is C Both 1 and 2
A nontariff barrier is a way to restrict trade using trade barriers in a form other than tariffs. Nontariff barriers include quotas, embargoes, certificates,sanctions, levies and other restrictions. Customs duty refers to the tax(tariff) imposed on goods when they are transported across international borders. In simple terms, it is the tax that is levied on import and export of goods. The government uses this duty to raise its revenues, safeguard domestic industries, and regulate movement of goods.