Jordan Likes to Use His Smartphone in His Car

Multiple Choice

Jordan likes to use his smartphone in his car. He uses it as a navigation device and connects it via Bluetooth to listen to music. He has purchased accessories that allow him to see his smartphone while he is driving. On a very cold day, and after driving for several minutes, Jordan receives a warning from his smartphone that it is overheating and needs to shut down. When he touches his smartphone, it is hot. 
What might cause Jordan's smartphone to overheat?

A) Bluetooth receiver is causing the smartphone to overheat.
B) The GPS receiver is causing the smartphone to overheat.
C) The smartphone is located too close to the car's heat vent.
D) The screen has been active too long.