A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.  If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
                    
                
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                A  0
                            
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                B $$\frac{1}{9}$$ 
                            
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                C $$\frac{2}{9}$$ 
                            
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                D $$\frac{1}{3}$$ 
                            
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                E  1