Why is the use of a.c. voltage preferred over d.c. voltage ? Give two reasons

Any two of the following (br any other correct) reasons :
(i) AC can be transmitted with much lower energy losses as compared to dc.
(ii) AC voltage can be adjusted (stepped-up or stepped down) as per requirement
(iii) AC current in a circuit can be controlled using (almost) wattless devices like choke coil.
(iv) a.c. is easier to generate