Critical Reasoning

Recently, many critics of the U.S. government have pointed out that this country is the only industrialized nation without a national vaccine laboratory and suggested that this lack makes the American public more vulnerable than other advanced nations to diseases such as avian flu or other flu epidemics. When asked at a press conference,a government official said these critics were disloyal and thus wrong about the public's vulnerability. To support his claim, he cited the international pre-eminence of American doctors and hospitals as well as the middle ranking of
the United States among United Nation member nations in the health categories of infant mortality, life span, and nutrition. He also added that all of the Europeans that he knew preferred to undergo major medical treatments in the United States rather than in the socialized medical systems in place in their home countries.
All of the following are flaws in the official's logic EXCEPT:
"¢ The official accepts that the quality of physicians and hospitals is a major factor, albeit not the only one, affecting
the public's vulnerability to disease.
"¢ The critics could be disloyal but not wrong.
"¢ The Europeans that the official cited are overwhelmingly wealthy males over the age of fifty.
"¢ The official relies on health statistics that are based on a complete accounting of deaths, injuries, and illnesses suffered by the American public from all causes, including the ten percent attributable to infectious diseases.
"¢ The UN health ranking that the official cited is based on an almost complete survey of the nations of the world.

OA:A

I am not able to rule out the choices D and E. and C for that matter, is not even stated in the passage.

How did we rule out other answer choices. ?