quEstions 21—23 ArE BAsED on A rEport ABout oBEsity. you now hAvE 15 sEConDs to rEAD quEstions 21—23. whAt DoEs "AnothEr potEntiAlly prEvEntABlE puBliC hEAlth DisAstEr" rEFEr to in thE lAst pAlAgrAphA．smoking.
B．oBEsity in young ADults.
C．Drinking.
D、oBEsity in ElDErly ADults.