What does "extremes of humanity" mean? (Definition)

they would have to clean it very clean

harlem's  cotton club boasted the talents of duke ellington. singers such as bessie smith and billie holiday popularized blues and jazz vocals. jelly roll morton and louis armstrong drew huge audiences as white americans as well as african americans caught jazz fever.

when people finally accepted that the peregrine falcon was endangered, different organizations came together to act to protect the falcon. in your own words, explain the steps taken by organizations like the us fish and wildlife service and the environmental protection agency to save the falcon. how did they cooperate to the falcon? use evidence from the text of “peregrine falcon” to support your response.

i would say the answer is b.) workforce to me because it seams the most logical but i'm not sure.