Which scenario is an example of physiologically important endocytosis in the intestinal epithelium?

Neonatal uptake of maternal immunoglobulins (IgA/IgG) across enterocytes by vesicular transport.

Absorption of water-soluble vitamins directly into hepatic sinusoids bypassing enterocyte vesicles entirely.

Enzymatic breakdown of bile salts on the enterocyte surface followed by simple diffusion into capillaries.

Continuous passive diffusion of monosaccharides across the apical membrane without involvement of vesicles.