To assess the effectiveness of a new public health campaign, researchers randomly selected 300 households from the North District of a large city. Members of these households were interviewed about their awareness of the campaign. Which of the following represents the largest population to which the survey results can be confidently generalized?
The 300 households surveyed.
All residents of the North District of that city.
All households in the North District of that city.
All residents of the entire large city.
