Paano nakatutulong sa matalinong pagdedesisyon ng mga konsepto ng trade-off, opportunity cost, at marginal thinking?

Which of the following statements best describes the spread of communism in the years immediately following world war ii? a. the number of communist countries increased during these years. b. the number of communist countries decreased during these years. c. the number of communist countries stayed the same during these years. d. the number of communist countries increased in asia but decreased in europe. ( answer in the format above for me to understand)

The county could deny african americans the right to attend white schools on the basis of

How did europeans and the introduction of european goods and ideas change native life ?