Which Statement About Cilia Is False

Which statement about cilia is false?

A) They are about 10 micrometers in length, and cells that have them usually have many of them.
B) They can be used to move fluids over the cell surface or to move the cell through fluids.
C) They are projections of the plasma membrane supported by microfilaments.
D) Their movement relies on the motor activity of axonemal dynein.