33. Figure 15 - The transport steps {,2,3, and 4 are... A) filtration of ECF, secretion, reabsorption, and excretion in urine B) filtration of ECF, reabsorption, secretion, and excretion in urine C) filtration of ECF, reabsorption, excretion, and secretion in urine D) filtration of ICF, reabsorption, secretion, and excretion in urine.