For which of the following purposes would it be most unreasonable to use a census?

To determine the proportion of students with a learning disability in a small rural area high school

To determine the proportion of red snappers with a high mercury level in the Gulf of Mexico

To determine the difference between the proportion of engineering professors and the proportion of business professors in favor of the new teaching initiative at a large university

To determine the mean wage earned by construction workers in a small town

To determine the mean selling price of houses in your neighborhood