Answer: USA
Notes: The researchers at NASA, have been allowed to study the moon samples collected by China, in a first-of-its-kind collaboration between the space agencies of the two countries. The laws by the US have till now kept NASA and its counterpart the China National Space Administration (CNSA) at a distance, but now they have been allowed to work together. As per the Wolf Amendment which was passed in 2011 by the US Congress, it places a ban on NASA from cooperating with China unless they have been authorised by lawmakers.
