【单选题】According to a 1980 survey, ten percent of all United States citizens over the age of sixteen are functionally illiterate. Therefore, if the projection that there will be 250 million United States cit...
A.
The percentage of high school graduates who do not go on to college has grown steadily over the past two decades.
B.
From 1975 to 1980 there was a three-percent decrease in the rate of functional illiteracy among United States citizens over the age of sixteen.
C.
Many United States citizens included in the 1980 survey would also be included in a survey conducted in the year 2000.
D.
Surveys that are improperly designed usually provide inaccurate results.
E.
In 1980 sixty-five percent of all United States citizens were over the age of sixteen.