While painting the house, Mila fell off the ladder and fractured her left clavicle. Treatment prescribed by the emergency room physician included the use of a sling for her left arm to immobilize the clavicle and speed up its healing. Which among the following muscles are temporarily "put out of business" by the sling?     extensor carpi ulnaris and extensor carpi radialis     trapezius and deltoid     trapezius and erector spinae     flexor carpi ulnaris and extensorn digitorum

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