New Car Owners Were Asked to Evaluate Their Experiences in Buying

New car owners were asked to evaluate their experiences in buying a new car during the past 12 months. In the survey, the owners indicated they were most satisfied with their experiences at the following three dealers (in no particular order) : Subaru, Honda, and Buick. Assuming that each set of rankings is equally likely, what is the probability that owners ranked Subaru first?

A) 1/3
B) 1/6
C) 1/2
D) 5/6
E) 6/6