What are the two pieces of scientific evidence that inspired the development of planetary boundaries?(Please select one answer)

A、PiesandCones
B、DennisandDonellaMeadowsLimitstoGrowth+SpaceshipEarthbyKennethBoulding
C、TheGaiaHypothesisofJamesLovelock+ThetragedyoftheCommonsbyGarrettHardin
D、EvidencethatweareintheAnthropocene+Therecognitionofglobal-scaletippingpoints