A group of researchers discovered a tribe of people in a South American jungle. The tribe had never been exposed to the outside world before. The researchers initially greeted the tribe with a smile. They believe that some emotional expressions have the same meaning for everyone. In this case, to which belief do these researchers subscribe?

How does specialization enable countries to trade with one another? a country can make and sell goods affordably and buy goods that it is inefficient at making. a country can make what it chooses and sell its goods to other countries. a country can decide to buy everything it needs from other countries. a country can efficiently make goods that were once difficult to make.

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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.