All of the Following Are Properties of Complement Fragment C5a

All of the following are properties of complement fragment C5a except

A) promotes ability of neutrophils to adhere to blood vessel walls.
B) serves as initial binding molecule of the membrane attack complex.
C) promotes increases expression of complement 1 receptor on phagocytes.
D) promotes adherence of red blood cells, lymphocytes, and endothelial cells to material requiring phagocytosis.
E) most potent chemotactic fragment.