Which of the following sentences correctly uses parallel structure? ANSWER FAST PLESSEEE!!!!!

When a broken bone heals, immobilizing the injury, eating foods rich in calcium, and get lots of rest.
When a broken bone is healing, it is important to immobilize the injury, eat foods rich in calcium, and get lots of rest.
When healing a broken bone, immobilize the injury and resting and eating foods rich in calcium.
When waiting for a broken bone to heal, immobilizing the injury is important, eat foods rich in calcium, and getting lots of rest.