Which of the following is true about absolute advantage principle? this is the only approach that can be used to explain why nations attempt to run a trade surplus. according to this approach, enhanced product specialization adversely affects communal welfare. this approach explains the process by which firms acquire and retain one or more value-chain activities inside the firm. this approach allows the nation to consume more than it otherwise could, generally at lower cost.

Methamphetamine (meth) is an addictive drug made chiefly in small toxic labs (stls) in homes, tents, barns, or hotel rooms. the manufacturing process is dangerous and often results in explosions, burns, and toxic fumes. government entities spend time and resources to find and destroy stls, imprison meth dealers and users, treat addicts, and provide services for affected families. meth cannot be made without ingredients that are also used in cold and allergy medications. arkansas has one of the highest numbers of stls in the united states. to recoup the costs of fighting the meth epidemic, twenty counties in arkansas filed a suit against pfizer, inc., which makes cold and allergy medications. what is pfizer's ethical responsibility here, and to whom is it owed? why?