The correct procedure for preparing a colloidal solution of egg albumin in water is :
A. to break the egg shell, take only the white portion and to add it to water with constant stirring
B. to break the egg shell, take only the yellow portion and to add it to boiling water with constant stirring
C. to boil the egg first, to be break the egg shell, to add the white portion to ice cold water and to mix
D. to boil the egg first, to break the egg shell, to add the yellow portion to water and to mix.
