Who is frederick douglass and what did he do?

Can someone me with this english question

What is the purpose of kings nobel peace prize acceptance speech

What task did the surveyors do? a. they studied the landscape to determine the most direct route for building a road. b. they designed treadmills that lifted blocks of stone to where they were needed. c. they dug trenches and filled them with sand, concrete, and large blocks to form a road.