The Enzyme Glycogen Phosphorylase:
A) Catalyzes a Cleavage Of $\beta$ (1 $\rightarrow$

The enzyme glycogen phosphorylase:

A) catalyzes a cleavage of $\beta$ (1 $\rightarrow$ 4) bonds.
B) catalyzes a hydrolytic cleavage of $\alpha$ (1 $\rightarrow$ 4) bonds.
C) is a substrate for a kinase.
D) uses glucose 6-phosphate as a substrate.
E) uses glucose as a substrate.