Egyptian civilization was “the gift of the Nile.” Which explanation best supports this statement?

Question

A.
The Nile kept Egypt safe from intruders, provided a mode of transportation, and had mud for making homes.

B.
The Nile transported boats carrying huge stones, which helped the Egyptians build the great pyramids.

C.
The Nile flooded every year, which made an otherwise arid desert fertile for agriculture.

Answer 1

I agree with what PsyDAG said, the answer is C.
Just to dive in a little more and understand, here:
The Greek historian Herodotus wrote that "Egypt was the gift of the Nile". An unending source of sustenance, it played a crucial role in the development of Egyptian civilization. Because the river overflowed its banks annually and deposited new layers of silt, the surrounding land was very fertile.

Now, understanding, the answer is clearly C.
Sites:
ArtHistory.com