In the context of the “Challenge of Expansion”, which of the following ideas is correct?

(i) Ensuring greater power to local government.

(ii) Establishing a sovereign and functional state.

(iii) Extension of federal principles to all the units of federation.

(iv) Inclusion of women and minority groups.

(a) (i), (ii), (iii)

(b) (ii), (iii), (iv)

(c) (i), (iii), (iv)

(d) (i), (ii), (iv)