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A researcher for a beverage company would like to test market a new carbonated soft drink.

She believes that age might affect the preference for this drink. The researcher divides the population into four age categories and then takes a random sample from each of the age groups.

This is an example of

A

Systematic sampling.

B

Stratified sampling.

C

Simple random sampling.

D

Cluster sampling.

E

Multi-stage sampling.

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