The Nurse Would Perform a Modified Allen Test for Which

The nurse would perform a modified Allen test for which reason?

A) To measure the rate of lymphatic drainage
B) To evaluate the adequacy of capillary patency before venous blood draws
C) To evaluate the adequacy of collateral circulation before cannulating the radial artery
D) To evaluate the venous refill rate that occurs after the ulnar and radial arteries are temporarily occluded