Set V={a,b,c,d,e,f}，E={a,b,b,c,c,a,a,d,d,e,f,e}，thendirected graph G=V,E is ( ) A: Weakly connected B: Strongly connected C: One-sided D: Unconnected

Set V={a,b,c,d,e,f}，E={[a,b],[b,c],[c,a],[a,d],[d,e],[f,e]}，then directed graph G=[V,E] is ( ) A: Weakly connected B: Strongly connected C: One-sided D: Unconnected