Choose A, B, C, D that best completes the sentence or that can substitute the underlined part.
_______, people continue to spend hours lying in the sun in the middle of the day.
A.Although warning about the potential danger of sunbathing
B.In spite of warning about the potential danger of sunbathing
C.Despite they are warned about the potential danger of sunbathing
D.Despite being warned about the potential danger of sunbathing