Answer:
I'd say its most likely A. sorry if I'm wrong
Answer:
Nile River is the longest by 1,815 miles.
Explanation:
The Nile River is 4,135 miles long and the Mississippi River is 2,320 miles long. The difference in miles is 1,815 miles.
I believe B. the material is cooler and denser would be correct.
The colder something is, the more density it has. Earth's core is too hot to be very dense, so that's why I would go with B.
