What does Plunkitt describe as honest graft in this reading? collecting votes for elections by bribing voters taking money from the city treasury by forging documents using inside knowledge to profit on city construction projects

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.