Which of the following is the best research topic question?
a. what is the history of the immigration policy in the u. s.?
b. how have increased concerns for homeland security since 9/11 affected us immigration policy?
c. why did the homeland security act of 2002 restructure the immigration and naturalization service?
d. what is meant by "naturalization "

What restrictions do you think should be placed on studies with animal participants? explain

The following force measurements were taken during actual testing of the lever pictured. what is the ama of this lever?

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