Final answer:
Computing devices can determine your location primarily using GPS and triangulation from cell phone towers, with Wi-Fi hotspots as an additional method.
Step-by-step explanation:
Computing devices can determine your physical location through several methods. One widespread method is the use of Global Positioning System (GPS), which relies on satellites that carry precise atomic clocks. A GPS receiver in your phone detects signals from these satellites and calculates your position. Another method is triangulation from nearby cell phone towers, which involves using the signal strengths from multiple towers to pinpoint a location.
Devices can also use the proximity to neighboring Wi-Fi hotspots to estimate location, as well as using the cell phone's make and model for broader location-based services. However, these are secondary to the precise location abilities offered by GPS and triangulation. The question is specifically about how computing devices know your location, and the correct answer to the question is B) triangulation from nearby cell phone towers and C) your phone's GPS system.