{{B}}{{i}} quEstions 11 to 13 ArE BAsED on thE Following tAlk on hygiEnE. you now hAvE 15 sEConDs to rEAD quEstions 11 to 13.{{/i}}{{/B}}

whAt is sAiD ABout thE BEst DistAnCE BEtwEEn A Book AnD our EyEs whEn rEADingA．it is 14 inChEs.
B．it is hArD to FigurE out.
C．it vAriEs From pErson to pErson.
D．it DEpEnDs on lighting ConDitions.