What can be inferred from Marc Brody's remarks about the new twist in geopolitics in the past 40 years？
A、China has shifted from an isolated country to a mysterious country.
B、China has shifted from an isolated country to a global leader on environmental issues.
C、US has shifted from an open country to an isolated country.
D、US always disengages from international commitments on environmental issues.
A、China has shifted from an isolated country to a mysterious country.
B、China has shifted from an isolated country to a global leader on environmental issues.
C、US has shifted from an open country to an isolated country.
D、US always disengages from international commitments on environmental issues.