Which Statement Concerning Cells Is NOT Correct

Which statement concerning cells is NOT correct?

A) Cells serve as the living building blocks of the body.
B) The average human cell is about 100 times smaller than the smallest particle visible by the unaided eye.
C) Inanimate chemical molecules are organized within each cell into a living entity.
D) Cells are generally colourless and transparent so they must be stained for visualization under a microscope.