Which of the following is a likely response of plants to cold stress?

A) the production of a specific solute "plant coagulant " that reduces water loss
B) reducing the size of ice crystals
C) conversion of the fluid mosaic cell membrane to a solid mosaic one
D) an increase in sterol concentration of membrane lipids so that the membranes remain flexible
E) increasing the proportion of unsaturated fatty acids in the membranes