Anna Enjoys Grilling Hamburgers,but She Wants to Reduce the Chances $\circ$

Anna enjoys grilling hamburgers,but she wants to reduce the chances that her food preparation practices result in food-borne illness.Which of the following steps should she avoid?

A) Washing her hands in warm soapy water for at least 20 seconds after touching the raw ground meat.
B) Sanitizing the plate that she used to carry the raw hamburgers to the grill before using it again.
C) Grilling the hamburgers until the internal temperature of the meat reached 160 ^$\circ$ F.
D) Thawing the frozen ground meat on the kitchen counter.