What is effective supporting evidence? evidence relevant to the author’s argument evidence unrelated to the author’s argument evidence containing facts contradictory to the author’s argument evidence containing facts partially related to the author’s argument

Not the answer but here is the graph. 

According to google the answer is 184800/hr

What are the statements?

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.