[单选题]
The important propertieyd-a kvq02mg 5 e-.jv)dr(y oes of animal cell membranes a6duqykcyl*qbkp 6 )v-; :o5hmre fluidity and permeability. Which molecule is responsible for ensuring the;5b)6- oqqk pyu d*:vymlc6kh membrane’s fluidity?
A. Cholesterol
B. Integral Membrane Proteins
C. Glycolipids
D. Peripheral Membrane Proteins