The word "hawk" (Paragraph 3) most probably means ______.

A．it is not wise enough to come up with effective measures
B．Mexican economy depends very much on cars and factories
C．Mexicans are able to adapt themselves to the current emergency
D．Mexicans enjoy playing dangerous games with their health

A．describe the harmful air pollution
B．explain the way to prevent air pollution
C．recommend a method to avoid air pollution
D．show the worries about the air pollution