The statement increased fatty acid side chain length and decreased temperature decrease membrane fluidity is true concerning membrane fluidity (Option B).
Membrane fluidity refers to all types of factors that increase the movement of components inside one layer of the plasma membrane, which is mainly associated with the temperature of the surrounding cell media and also with the length of the fatty acids that form lipids.
Therefore, with this data, we can see that membrane fluidity is affected by the temperature and length of the fatty acids that compose the phospholipids.
Learn more about membrane fluidity here:
https://brainly.com/question/8067467
#SPJ1