If the battery inside an iPhone is dented, punctured, swollen, or otherwise damaged, which of the following is the proper next step to take?
A. Reassemble the iPhone and replace whole unit.
B. Reassemble the iPhone and return it to the customer.
C. Turn on the device and run it until the battery is below 50 percent charge, then replace the battery carefully.
D. Remove the battery carefully, then replace it.