21. What are lipid raft composed of?

(A) Sphingolipids + cholesterol

(B) Sphingolipids + cardiolipin

(C) Triacylglycerol + sphingolipids

(D) Ceramides + phosphatidylcholine

(E) Phosphatidylcholine + GM1 (monosialotetrahexosylganglioside)

What are lipid raft ...