Water in a porcelain container is placed in a microwave oven to heat it. The temperature of the water rises, but the container temperature does not rise much. This is because

a) porcelain is a bad conductor of heat.
b) water is a liquid and can set up convection currents but the container is solid non conductor.
c) preferential absorption of microwaves of certain frequencies by water.
d) microwaves are more energetic than infrared waves.