Which of the Following Statements About Graded Potentials and Action

Which of the following statements about graded potentials and action potentials is NOT true?

A) The duration of a graded potential is related to the duration of the stimulus.
B) Graded potentials can by produced by the net movement of Na⁺, Cl^-, K⁺ or Ca⁺
Across the plasma membrane.
C) Graded potentials can occur as the result of either hyperpolarization of
Depolarization of the plasma membrane.
D) Action potentials show temporal and spatial summation.
E) Action potentials are triggered through the passive spread of membrane
Depolarization.