In 2006, the General Social Survey asked "would you like to see more or less government spending upon natural disasters?" Of the 1496 respondents, 723 responded "more" or "much more". The population of interest consists of?
a. the proportion of respondents who responded "more" or "much more"
b. the 1496 respondents
c. the 723 respondents who responded "more" or "much more"
d. all American adults
e. the proportion of American adults who would respond "more" or "much more"