ClicktheExhibitbutton.Assumingthetaglibraryintheexhibitisimportedwiththeprefixstock whichcustomtaginvocationoutputsthecontentsofthevariableexposedbythequotetag?()

A、<；stock：quote&ensp；symbol="；SUNW"；&ensp；/>；${var}

B、${var}.&ensp；<；stock：quote&ensp；symbol="；SUNW"；&ensp；/>；

C、<；stock：quote&ensp；symbol="；SUNW"；>；.&ensp；${var}.&ensp；<；/stock：quote>；

D、<；stock：quote&ensp；symbol="；SUNW"；&ensp；var="；quote"；&ensp；/>；${quote}