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What are three voluntary behaviors that is not control by results?

What are objects called that have value in and of themselves as well as value as a means of exchange? custom commodity money currency simple money

According to subpart d, research with children may be eligible for exemption when: the children will be asked to complete a surveythe research involves the use of educational teststhe children will be interviewed by the researcher. the research with children will involve participant observation with researcher interaction.