For the electrochemical cell, X- | X || M+ | M, E0 (M+ | M) = 0.44 V and E0 (X | X- ) = 0.33 V. From this data one can deduce that
(a) M + X → M+ + X- is the spontaneous reaction
(b) M+ + X- → M + X is the spontaneous reaction
(c) Ecell = 0.77 V
(d) Ecell = - 0.77 V