Who achieved the first powered flight of an airplane in 1903? a. otto lilienthal b. louis bleriot c. alberto santos-dumont d. orville and wilbur wright

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

hope this

the answer is a) to be able to obey them.