Show that G is semiconnected if and only if there is a directed path that visits all of the vertices of G.
a) If G is semiconnected, then there is a directed path visiting all vertices.
b) If there is a directed path visiting all vertices, then G is semiconnected.
c) If G is not semiconnected, there is no directed path visiting all vertices.
d) The existence of a directed path visiting all vertices does not guarantee G is semiconnected.