An arteriovenous anastomosis is used to increase blood flow in hemodialysis. Which one of the following describes a direct arteriovenous anastomosis?
A. Insertion of a cannula
B. A section of artery and a neighboring vein are joined
C. A donor's vein is used to connect an artery and a vein
D. Radical hysterectomy not otherwise specified
E. A synthetic vein is used to connect an artery and a vein