In 2008, the exchange rate between euros and US dollars was 1 euro for $1.55. In 2019, the rate was 1 euro for $1.12. Based on this information, which conclusion can be drawn about the value of the euro in international trade?

A.
In 2019, European nations could purchase more US goods than they could for the same price in 2008.
B.
In 2019, the United States had to lower its prices on goods sold to European nations.
C.
In 2019, European nations could purchase fewer US goods than they could for the same price in 2008.
D.
In 2019, the United States had to raise its prices on goods sold to European nations.
!PLEASE HELP!

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.