Ralph nader, a member of the school board in san joaquin county, is appalled at the amount of junk food in the schools. he convinces the state legislature to pass an ordinance that no stores may sell any unhealthy, junk food within 500 feet of any school, including colleges or day care centers. a professor of business law raises the issue of whether the regulation is valid and is told that it is a valid exercise of the jurisdiction's police power to protect its citizens. convenience stores balk at the regulation and challenge it in court. what concept is addressed in regard to the reference to police power"? "

It is widely assumed that people need to engage in intellectual activities such as solving crossword puzzles or mathematics problems in order to maintain mental sharpness as they age. in fact, however, simply talking to other people—that is, participating in social interaction, which engages many mental and perceptual skills—suffices. evidence to this effect comes from a study showing that the more social contact people report, the better their mental skills. which of the following, if true, most seriously weakens the force of the evidence cited? (a) as people grow older, they are often advised to keep exercising their physical and mental capacities in order to maintain or improve them. (b) many medical conditions and treatments that adversely affect a person's mental sharpness also tend to increase that person's social isolation. (c) many people are proficient both in social interactions and in solving mathematical problems. (d) the study did not itself collect data but analyzed data bearing on the issue from prior studies. (e) the tasks evaluating mental sharpness for which data were compiled by the study were more akin to mathematics problems than to conversation.