The Nurse Explains to a Client with Open-Angle Glaucoma That

The nurse explains to a client with open-angle glaucoma that the purpose of using betaxolol (Betoptic) ,a selective beta-adrenergic blocker,is to:

A) decrease the production of aqueous humor.
B) promote the flow of aqueous humor.
C) reduce the redness and irritation associated with glaucoma.
D) protect the optic nerve from the increased blood supply that could occur.