Social studies ! will give brainliest! entrepreneurs develop new goods and services. why is entrepreneurship so hard? a. there is a risk that the new business may fail. b. there are laws that restrict most new businesses c. motivation for profit may not be the best incentive. d. healthy competition encourages higher quality products.

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