PLEASE HELP ME What factor made this type of poster a necessity?

the military’s inability to enforce conscription

the difficulty of paying for the war effort

the desire to turn U. S. citizens against Germany

the fear of a German invasion of the United States

Answer///an appropriate hitch and safety chains should be used;

See diagram.we use washers to get the area and we will be integrating with respect to xouter radius is the  distance between y = e^x and y = -1    inner radius of washer is the distance between y = 1 and y = -1    the area of one cross-section of a washer is    solid lies between x = 0 and x = 2. the volume is    if you need this expanded, then    the question doesn't say to evaluate, so we're done.