What percentage of Americans currently view themselves as extremely conservative?

What percentage of Americans currently view themselves as extremely conservative?
 
  a. 2 to 4 percent
  b. 4 to 8 percent
  c. 8 to 12 percent
  d. 12 to 16 percent

Question -2-

Which American president once said, What I want is to get done what the people desire to be done, and the question for me is how to find that out exactly.
 
  a. Andrew Jackson
  b. Abraham Lincoln
  c. Theodore Roosevelt
  d. Bill Clinton

Question -3-

In public opinion research, the _________ is the group of people whose preferences the researcher wants to measure.
 
  a. subject group
  b. demographic group
  c. sample
  d. universe