It is the isthmus of Suez which is very narrow.
Well, as we know from the formula,
Distance = speed of recession/Hubble constant
so we can infer that as distance become larger, the recession velocities will also become larger
A, I just know its not any of the other ones
True it is the fourth or fifth largest river in america
C. a delta. Because a delta is the only one of those choices to where it is formed at the mouth of a river