An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy `E_0`. Its potential energy and kinetic energy respectively are
Options:
(a) `2E_0 and -2 E_0`
(b) `-2E_0 and E_0`
(c) `2E_n and - E_n`
(d) `-2E_0 and - E_0`