How did the Russians "help" North Korea after World War II? Russian troops stayed and help set up a communist government in North Korea.

They helped North Korea recapture parts of Japan.

Russian troops stayed and help set up a democracy in North Korea.

They helped North Korea recapture parts of China.

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a. static group comparisonb. pretest-posttest control group designc. control-group-time-series designd. nonrandomized control-group pretest-posttest design