Which of the following factors would tend to increase membrane fluidity?

Thank you for posting your question here at . I hope the answer will help you. Feel free to ask more questions.
below are the choices, the answer is A> 

A) 
a greater proportion of unsaturated phospholipids
B) 
a greater proportion of saturated phospholipids
C) 
a lower temperature
D) 
a relatively high protein content in the membrane
E) 
a greater proportion of relatively large glycolipids compared with lipids having smaller molecular masses

Some of her  assignments would be creation of drugs. she is a medical chemist after all so she'd need to have the necessary knowledge to make medicine which can later be sold in a pharmacy