If you were to design a long-term research study to determine why there are no human births in Lapland during the months of August, September, and October, you would need to also examine a comparison population of humans in which births took place every month. The primary reason for including a comparison population within the design of this experiment would be to: a. accumulate more facts that could be reported to other scientists.
b. test the effects of more than one variable at the same time.
c. prove that there are no births in Lapland during August, September, and October.
d. act as a control that would ensure that the results obtained are due to a difference in only one variable.

d. act as a control that would ensure that the results obtained are due to a difference in only one variable.

Explanation:

The primary reason for including a comparison population within the design of this experiment in which there was a need to also examine a comparison population of humans in which births took place every month would be to act as a control that would ensure that the results obtained are due to a difference in only one variable. This would ensure more accuracy of the experiment in relation to the factor considered.

answer; i believe that the correct answer is ( rivers);

the answer is solomon northrup. he was a free-born african american, abolitionist and professional violinist that was drugged, kidnapped and sold as slave in 1841 and remained in captivity until 1853 where he regained his freedom with the of the then-governor of new york, washington hunt. he wrote and published his memoirs "twelve years a slave" in 1853, and in this text, he tells the story of his escape thru one of louisiana's swamps (the great pacoudrie swamp) in which he ended up covered in green slime from crossing the surface of the dead water.