Students stand in groups waiting for someone to unlock their classroom. The people in each group are able to attend to the voices in their own conversation group and screen out the voices in others. This is an example of ______________?

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Students stand in groups waiting for someone to unlock their classroom. The people in each group are able to attend to the voices in their own conversation group and screen out the voices in others. This is an example of ______________?

A. shadowing
B. selective listening
C. parallel processing
D. None of these