A. A greater proportion of unsaturated phospholipids.
Work Step by Step
Fluidity increases with unsaturation (A), while B gives the opposite of the correct answer. C and D are also wrong since they would reduce fluidity.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.