Which of the following is an example of hierarchical diffusion? a) a brand of sunglasses becomes popular after a soccer star is seen wearing them. b) an illegal immigrant is deported from the united states. c) many computer makers start to use the same type of user interface. d) popular cell-phone ringtone becomes popular around the world.

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.

According to ohrp, a problem is an “unanticipated problem” when it meets which of the following criteria: unexpected, related or possibly related to the research, suggests that the research does not put the subjects or others at greater riskunexpected, related or possible related to the research, suggests the research puts subjects or others at greater riskunexpected, unrelated to the research but still occurring with a subject, suggests the research puts others at greater riskexpected, related or possible related to the research, suggests the research puts others at greater risk

Under the rule of constantine, what changed in the empire? a.the empire expandedb.the empire accepted christianityc.the empire banned all religionsd.the empire went into civil war