6.Trade barriers are often enacted to protect industries and workers within a country. This is refereed as protectionism. For example, tariffs, quotas and embargoes make foreign good more expensive and less available so I would say no it is not better for a country to have trade barriers
1. When you make a purchase with your credit card, you are borrowing money from your card issuer. You don’t have to use your own money until you pay your credit card bill. By contrast, debit cards are linked to your checking account.
2.Credit cards have a major impact on your credit score. Use your credit card wisely, and you’ll be on the way to a great credit score but if you make a mistake like missing a card payment for 30days or more your credit score will drastically go down. The more you mess up the more your credit score will fall.