According to the last paragraph, as far as the action of washing hands is concerned, the main advice given by health care specialists in UK relates...

According to the last paragraph, as far as the action of washing hands is concerned, the main advice given by health care specialists in UK relates

To the duration of the process.
A) to the temperature of the water used.
B) to the amount of soap used.
C) to the frequency of the action.
D) to the type of soap used.
E) to the duration of the process.