Which of the following statements about "intro" is true?

A、Ittellsthestoryofthesongbeforethefirstlyricstarts.;
B、Theelementsofasong,thegroove,andtheatmosphereareallintroducedintheintro.;
C、"Intro"makesyouwanttohearwhatiscomingnext.;
D、Alloftheotheroptions.