The correct answer for the question that is being presented above is this one: "C.) 53.0°"
The height is 6 feet = 72 inches.
The base is 55 inches.
The angle of elevation can be solved by:
tan (angle) = 72 in / 55 in
tan (angle) = 1.3091
angle = 52.62438444
angle = 53 degrees.