What is the principle of comparative cost advantage

Over the past decade, brands that were once available only to the wealthy have created more affordable product extensions, giving a far broader range of consumers a taste of the good life. jaguar, for instance, launched its x-type sedan, which starts at $30,000 and is meant for the "almost rich" consumer who aspires to live in luxury. by marketing to people who desire a luxurious lifestyle, jaguar is using:

What legislation increased the ability for federal authorities to tap telephones and wireless devices, tightened the enforcement of money laundering activities, as well as broadened powers toward acts of terrorism and acts such as drug trafficking?

Which career pathways require workers to train at special academies? a.emts and emergency dispatchers b.crossing guards and lifeguards c.police officers and firefighters d.lawyers and judges