For the biceps brachii, which statement correctly identifies origin, insertion, and action?

• A. Origin is the fixed attachment (scapula); insertion is the movable attachment (radial tuberosity); action is elbow flexion (forearm curling toward shoulder).
• B. Origin is the movable attachment (clavicle); insertion is the fixed attachment (humerus); action is elbow flexion.
• C. Origin is the fixed attachment (radius); insertion is the movable attachment (scapula); action is elbow extension.
• D. Origin is the fixed attachment (scapula); insertion is the fixed attachment (humerus); action is forearm supination.

Answer: (A)