How does cholesterol regulate the fluidity of the animal cell membrane at different temperatures?

Options:

• A: It decreases fluidity at high temperatures by restraining phospholipid movement, and increases fluidity at low temperatures by preventing tight packing of phospholipids.
• B: It increases fluidity at high temperatures by disrupting hydrophobic interactions, and decreases fluidity at low temperatures by promoting tight packing.
• C: It decreases fluidity at both high and low temperatures by acting as a rigid physical barrier within the lipid bilayer.
• D: It increases fluidity at both high and low temperatures by continuously hydrolyzing the fatty acid tails of phospholipids.

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