Which one of the following can be inferred about Harris sparrows from the passage? A. Among Harris sparrows, plumage differences signal individual status only within age groups. B. Among Harris sparrows, adults have priority of access to food over juveniles. C. Among Harris sparrows, juveniles with relatively dark plumage have status equal to that of adults with relatively light plumage. D. Juvenile Harris sparrows engage in aggressive interaction more frequently than do adult Harris sparrows. E. Harris sparrows engage in aggressive interaction less frequently than do greater titmice.