You want to know the brand of jeans worn most often by people 20 to 30 years old. which of the following surveys is biased?

a)surveying people 20 to 30 years old at a store that sells one brand of jeans
b)surveying people 20 to 30 years old at a store that sells only jeans
c)surveying everyone at a store that sells only jeans

answer: 2 answers

step-by-step explanation: the first one means to spread the product throughout the marketplace such that a large number of people can buy it.  

the second means the process of making a product or service available for the consumer or business user that needs it.

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a mantle plume is an upwelling of abnormally hot rock within the earth's mantle. as the heads of mantle plumes can partly melt when they reach shallow depths, they are thought to be the cause of volcanic centers known as hotspots and probably also to have caused flood basalts.

step-by-step explanation: