Anyone know the answer?

What new form of music swept the nation in the 1950s a. chamber music b. hip-hop c. jazz d. rock-and-roll

One of the great societal changes brought about by industrialization in europe was a. slavery. b. urbanization. c. ruralization. d. democracy.

The procedures for reporting potential unanticipated problems involving risk to subjects or others to the irb are: stated in the human subject protection regulations, but not in the drug or device regulationsincluded in the consent processdetermined by research staffdetermined by the institution in its written policies and procedures