[单选题]
The important properties of animal crjw:,n od83ktn sv n4.2*s1umr/r g(tjrt3a x ell membae4 * .*4fmf9a pxspn asm-ay/ranes are fluidity and permeability. Which molecule is responsible for ensuring the membna f./mamx e9pfy* a4*psas -4rane’s fluidity?
A. Cholesterol
B. Integral Membrane Proteins
C. Glycolipids
D. Peripheral Membrane Proteins