With reference to China, BeiDou is a ___?
[D]Ballistic Missile System
China’s home grown navigation system ‘BeiDou’ will be achieving full-scale global coverage by around 2020. With the aid of a constellation of 35 satellites, the BeiDou navigation system will pose a stiff challenge to America’s Global Positioning System (GPS). China started to build up its own space—based Positioning, Navigation and Timing system in 2000 by launching the first satellite for an experimental version of the BeiDou.