单选题：For undirected graph $$G=(V,E)$$, which of the following stateme

For undirected graph $$G=(V,E)$$, which of the following statements is TRUE?




A.$$G$$ must be connected if $$|V|>|E|$$.
B.$$G$$ must be connected if $$|V|<|E|$$.
C.$$G$$ must NOT be connected if $$|V|=|E|-1$$.
D.$$G$$ must NOT be connected if $$|V|>|E|+1$$.


答案：D