(Choose 1 answer)
Given a simple graph G with 8 edges. The complementary graph of G, denoted by G', is the graph on the same vertices, and two vertices are adjacent in G' if and only if they are not adjacent in G. If G' has 2 edges,how many vertices does G have?
A. 5
B. 6
C. 7
D. 8
E. 9
Exit 10
