A kitchen circuit is protected by a 15A MCB. Three appliances are ON simultaneously: a kettle 1500W, a room heater 1000W and a toaster 500W, all designed for 220V. The user now wishes to run an additional mixer-grinder rated 1000W on the same circuit. Which action below will prevent the MCB from tripping?
(a) Plug the mixer-grinder into a different socket on the same circuit using a multi-plug
(b) Switch off the room heater before switching on the mixer-grinder
(c) Replace the existing 15A MCB with a 30A MCB
(d) Switch off only the toaster before switching on the mixer-grinder