Several Archaea Have a Lipid Monolayer Instead of a Lipid

Several Archaea have a lipid monolayer instead of a lipid bilayer comprising their cytoplasmic membrane.Why could this be an advantage?

A) This type of chemical lipid structure is more stable at very high temperatures.
B) Proteins are able to integrate more easily into this type of structure.
C) This type of structure is permeable to protons.
D) Carbohydrates can easily diffuse across this structure to provide nutrients for the cell.
E) This type of structure offers considerable protection against osmotic pressure.