Which structural arrangement of phospholipids is most energetically favored in an aqueous environment and why?

Linear single-file chains oriented across the water column, because this maximizes hydrophobic exposure to water and therefore reduces entropy loss.

Bilayer formation with hydrophilic heads facing the aqueous exterior and interior and hydrophobic tails sequestered inside, because this arrangement minimizes unfavorable water–hydrophobic tail interactions while maintaining headgroup hydration.

Randomly dispersed monomers uniformly mixed with water, because amphipathic molecules have no tendency to self-assemble and will remain in monomeric form under physiological conditions.

Crystalline lattice of phospholipids with tails protruding into the water and heads buried internally, because burying polar groups reduces energetic cost in an aqueous environment.