What is the function of the roughened tubercles at the proximal end of the humerus?
A. They are the points of attachment between the scapula and humerus.
B. They are for the attachment of muscles by way of tendons.
C. They accommodate the passage of the biceps brachii tendon.
D. They serve to attach ligaments.
E. They are attachment points for the periosteum.
Answer: B
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