1.A simplecircuit containing every edge of a graph is called a . (A) Kruskal circuit (B) Euler circuit (C) Turing circuit (D) Hamilton circuit (E) Dijkstra circuit

50. Which of the following may be the moral of this fable? (A) Prevention is better than cure. (B) One must strike while the iron is hot when pursuing his dreams. (C) God helps those who help themselves. (D) One has to take full responsibility for the wrong decision he makes.