If You Were to Cut the Biceps So That It

If you were to cut the biceps so that it no longer had an attachment to bone,why would this limit motion of the upper arm?

A) The biceps and triceps antagonize one another in the motion of the arm; cutting removes one antagonist.
B) The biceps is where arm connects to all relevant nerve cells.
C) The biceps is the main muscle for moving the arm.
D) The other arm muscles all connect to the biceps and would also become detatched as a result.
E) None of the answer choices are correct.