[单选题]
The center of mass of a two-parxy) 57tkb:(tb8j-dsi epe )l)zmw/uzticle system is at the origin. h,v9.jt ;qglo One particle is located at (3.0 m, 0) and has a mass of 2.0 kg. What is th9g;t,ohvl q.je location of the second mass of 3.0 kg?
A. (-3.0 m, 0)
B. (-2.0 m, 0)
C. (2.0 m, 0)
D. (3.0 m, 0)
