The question above is incomplete, its options are given below:
A. This World War II advertisement shows Uncle Sam with the caption “I Want You for the US Army.
B. This World War II advertisement shows the famous boxer Joe Louis with the caption “We’re going to do our part . . . .”
C. This World War II advertisement shows a British man with the caption “This man is your friend."
D. This Army Air Force advertisement shows an Air Force officer with the caption “O’er the ramparts we watch."
ANSWER
The correct option is B.
People normally have high regard for famous people, so when these people are shown in advertisements doing or endorsing a particular thing, it encourage other people too do that particular thing. Showing a famous boxer who endorse joining the army will encourage a lot of people to join the army.