If z_{1} , z_{2} ,z_{3} , z_{4} are roots of the equation a_{0}z^{4} + a_{1}z^{3} + a_{2}z^{2} + a_{3}z + a_{4 }= 0, where a_{0} , a_{1} , a_{2} , a_{3} and a_{4} are real, then

(A) bar (z_{1} , z_{2} , z_{3} , z_{4} are also roots of the equation

(B) z_{1} is equal to at least one of bar (z_{2}, z_{3} , z_{4})

(C) bar(-z_{1} , -z_{2} ,- z_{3} , z_{4}) are also roots of the equation

(D) None of the above.