A city council conducted a survey on speed bumps to see what residents preferred. The council asked every resident in one particular neighborhood what his or her preferences were. Were the results of the city council's survey valid? A. No, because the city council did not survey a sample that is representative of the population.

B. Yes, because every resident in a neighborhood was surveyed.

C. No, because neighborhoods did not have speed bumps.

D. Yes, because the neighborhood surveyed wanted speed bumps.