Which of the following statements about vascular spasms is false?

• A. It occurs when smooth muscle cells surrounding the blood vessel relax, increasing the vessel's diameter.
• B. It can help reduce blood flow immediately after a blood vessel is damaged, thereby reducing blood loss.
• C. It is the first step of hemostasis, directly preceding platelet plug formation.
• D. It is initiated by chemicals released by damaged endothelial cells, smooth muscle, & activated platelets.