Which country powered up its Artificial Sun?

Which country powered up its Artificial Sun?

A. China
B. Russia
C. USA
D. Iran

China has successfully activated its so-called “artificial sun,” a nuclear fusion reactor that could fuel its energy ambitions for years to come — if they can make it more sustainable. China’s Atomic Energy Authority fired up its HL-2M Tokamak reactor for the first time on Friday, state-controlled media report.