Pros: https://www.tracking-system.com/news/3-tracking-system-information/1200-benefits-of-gps-on-phone.htm......
https://www.trails.com/facts_10153_what-benefits-gps-cell-phones.html
Pros/Cons: http://smallbusiness.chron.com/advantages-disadvantages-cellphone-tracking-34399.html
http://www.trackapartner.com/pros-and-cons-of-cell-phone-tracking
The answer to your question is D.
<span>D Overlap objects cuz I do that to some times</span>
