Which of the following BEST explains why the 1920's were known as the “roaring twenties?" a. Foreign trade prospered after WWI

b. The US assumed a leadership role in world affairs.

c. Political reforms made government more democratic

d. Widespread social and economic change occurred.

Identify three different reasons of why people have had to migrate and give examples to justify your reasons. use 3-6 sentences to explain your response.

What is donald trump wanting to build and have finished by 2020?

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.