When the president entered the room, everyone ______ to welcome him.

A．The US's Monsanto agreed with the results of Chinese scientists study
B．GM cotton is an ideal crop
C．The US's Monsanto dismissed the research for its own profit
D．Cotton bollworm has no resistance to Bt cotton over time

A．Bt cotton is stronger than common cotton.
B．Bt cotton yields more than common cotton.
C．Bt cotton needs less pesticides than common cotton.
D．Bt cotton is harm to cotton bollworms.