Country X can produce 1,000 units of food and 2,000 units of clothes. Country Y can produce 1,000 units of food and 1,000 units of clothes. In order to maximize trade according to the principles of comparative advantage, A) country X should produce food and import clothes from country Y. B) country Y should produce food and import clothes from country X. C) country X and Y should produce both food and clothes to meet their own needs. D) country Y should produce both food and clothes, and import additional clothes from country X.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

Why does the united states constitution require that a national census be taken every ten years?

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