For Delineation of the Acromion and Coracoid Processes of the Scapula

For delineation of the acromion and coracoid processes of the scapula in the lateral projection,how is the arm positioned?

A) Flex the elbow and place the hand on the anterior abdomen.
B) Flex the elbow and place the hand on the posterior thorax.
C) Extend the arm upward and rest the forearm on the head.
D) Extend the arm straight down at the side in the anatomic position.