Thedistributionofthenumbersofhoursthatstudentsatacertaincollegestudiedforfinalexamshasameanof12hoursandastandarddeviationof3hours.Whichofthefollowingnumbersofhoursarewithin2standarddeviationsofthemeanofthedistribution?Indicateallsuchnumbers
A.2B.5C10D.14E.16