In Biological Membranes, the Phospholipids Are Arranged in A

In biological membranes, the phospholipids are arranged in a:

A) bilayer with the fatty acids pointing toward one another.
B) bilayer with the fatty acids facing outward.
C) single layer with the fatty acids facing the interior of the cell.
D) single layer with the phosphorus-containing region facing the interior of the cell.
E) bilayer with the phosphorus groups in the interior of the membrane.