Central American cities emerged as ceremonial centers

Based on this excerpt from the student text, which of the following is a line agency?

a. the National Security Council, which the President on national security matters b. the Office of the Vice President, which helps the Vice President perform his or her duties c. the Securities and Exchange Commission, which the nation's stock markets d. the Office of the US Trade representative, which recommends trade policies to the President

The principle advantage of open-ended questions is that they

a. are easier to score and code. b. eliminate the problem of social desirability bias. c. offer the respondent greater flexibility. d. minimize the problem of expressiveness and spontaneity.