Some anthropologists study modern-day societies of foragers in an effort to learn about our ancient ancestors who were also foragers. a flaw in this strategy is that forager societies are extremely varied. indeed, any forager society with which anthropologists are familiar has had considerable contact with modern nonforager societies.
which of the following, if true, would most weaken the criticism made above of the anthropologists' strategy?
(a) all forager societies throughout history have had a number of important features in common that are absent from other types of societies.
(b) most ancient forager societies either dissolved or made a transition to another way of life.
(c) all anthropologists study one kind or another of modern-day society.
(d) many anthropologists who study modern-day forager societies do not draw inferences about ancient societies on the basis of their studies.
(e) even those modern-day forager societies that have not had significant contact with modern societies are importantly different from ancient forager societies.

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.

What natural resource from west africa had a significant im pact on the growth of ghana

The most heavily populated areas of africa are found