B. why our city needs more carpool lanes, because that topic doesn't have much evidence/facts/info to back it up as the other ones.
Answer:
Once you are out of school there will be lots of pressure that you will have to handle, nobody will spoon-feed you, and nobody would even pinpoint where you are making mistakes. Even if you fail in life, you will have to take responsibility on your shoulders.
Explanation:
Working out: 6.25% = 4 half lives (20x4=80ma) 80ma is how old the rock is