The Best Way to Reduce the Possibility of Incidental Contaminants

The best way to reduce the possibility of incidental contaminants getting into foods while microwaving is to:

A) use bleached white cardboard containers for microwaving
B) transfer leftover foods into margarine tubs to reheat
C) add a small amount of nitrites to the foods before heating
D) use glass or ceramic containers for heating foods in the microwave
E) start on medium-high power and then increase to high power during the second half of the heating time