Aresearcher asks an irb to waive the requirement for parental permission for a study conducted in schools because the nature of the research requires participation of all the children present in classrooms on the day the research will take place. assuming that the basic research design could be approved by the irb and the school, which of the following requirements must be met before an irb could waive parental permission? (a) the research must pose no more than minimal risk.(b) an independent consultant must approve the waiver.(c) parents must be notified that the study is taking place.(d) the students must be offered an optional classroom activity.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

would it be plagiarism to copy and paste off of here? ?

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.

answer; approx,300,000 ;