After Reading the Paragraph Below, Answer the Question That Follows

After reading the paragraph below, answer the question that follows.
In cold blooded (ectothermic) animals changes in environmental temperature are felt throughout the organism. All cellular functions will potentially be affected by these thermal changes. At low but above zero temperatures, cell membranes may effectively freeze, and this is a major problem that must be avoided by ectotherms living in temperate environments like much of Canada.
-What are the repercussions of membrane freezing?

A) It will cause the composition of the membranes to change.
B) It will prevent the movements of proteins within membranes.
C) It will cause membranes to fall apart.
D) It will cause membranes to fuse.