3. Three people, A, B, and C, are playing the game "Scissors, Rock, Paper." In each round, A, B, and C simultaneously show one of the gestures: scissors, rock, or paper, and they do so independently. Let the number of people who beat A in a round be $\xi$. Then the expected value $E \xi$ of the random variable $\xi$ is ( ).
(A) $\frac{1}{3}$
(B) $\frac{4}{9}$
(C) $\frac{2}{3}$
(D) 1