Hi All,  I am sure this is an easy question for someone in here.  Is
there a better, cleaner, shorter way to write this:

if ( ($('#price_group_lesson').attr("value") == 'B') || ($
('#price_group_lesson').attr("value") == 'C') || ($
('#price_group_lesson').attr("value") == 'D') ){
                                $('#price_group_lesson_yes').slideDown('fast');}
                                
else{$('#price_group_lesson_yes').slideUp('fast');}

I am creating a pretty custom questionnaire, and it has a lot of logic
in it.  I wish I didn't have to type it all out like that.  I am sure
there is something in javascript or jquery where I can say $
('#var').attr('value').in("A","B","C")

Thanks

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