The most important character exclusive to human beings is______.

A．The court denied the EPA's excuses as sufficient for its inaction.
B．It remained undecided whether the court accepted the excuses.
C．The court thought the excuses are similar to that of coal-fired power plants.
D．The court will examine the EPA's excuses further.

A．It is the government's obligation to set up stricter regulation.
B．It is disappointing for the public that the government shies away this problem.
C．The government is the only organization that can control greenhouse gases.
D．The government is not the chief organization authorized to control greenhouse gases.