Slave dred scott sued for his freedom on the basis that his owner had taken him to live in a free state and then a free territory. his case was argued in front of the supreme court in 1857. what was the supreme court's ruling in the dred scott v. sandford case? a. the court ruled that dred scott should not be freed because he had not proven that he had been taken to a free state. b. the court ruled that dred scott should be freed because slavery was unconstitutional. c. the court ruled that dred scott was the property of his owner and that the owner's rights were protected by the constitution, therefore dred scott would not be freed. d. the court ruled that dred scott should be freed because he had been taken to areas in which slavery was illegal.

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.