What is the intersection of the sets A = {2, 3, 5, 7, 11} and B = {5, 11, 13, 15, 17}?
A. {5, 11}
B. {2, 3, 5, 7, 11, 13, 15, 17}
C. {2, 3, 5, 7, 11}
D. null set