Agallup poll conducted in 2013 asked respondents whether they favored or opposed affirmative action for women, and separately asked whether they favored or opposed affirmative action for racial minorities. if respondents were asked first about affirmative action for women, they favored it 62% to 30%. however, if respondents were asked first about affirmative action for racial minorities, they then favored affirmative action for women by a much smaller margin: 56% to 39%. this is an example of which of the following? a. sampling bias due to voluntary response b. sampling bias due to undercoverage c. response bias d. non-response bias