SAT Probability and conditional probability Question

A district school board in a certain state is proposing a change to the time school starts for all high schools in the district. A sample of 353 high school students was selected at random from all high school students in the district. The selected students were asked whether they approved of the proposed change, and 300 students responded that they did not approve. Which of the following is the largest population to which the results of the survey can be generalized?