One histogram shows the distribution of ages of all 638 used cars for sale in the Ventura County Star Sunday newspaper in 2013. The other three graphs show distributions of means from random samples taken from the same population of used cars. One histogram shows means based on samples of 2 cars, another shows means based on samples of 5 cars, and another shows means based on samples of 10 cars. Each graph based on means was done with many repetitions. Which distribution is which, and why? 

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(A) 150 100 50 8 16 24 32 40 48 Age Frequency