Based on the information in Passage 1, which of the following could be dated using carbon-14 dat-ing?
A) An iron pot found in a cave
B) A rock at the bottom of a quarry
C) An arrowhead made from bone
D) The remains of a house made from stone

The eocs or end of course exams i believe

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.