The correct answer is, A) Nubia.
The kingdom once merged with Egypt was Nubia.
In ancient Egypt, lower Nubia was part of Egypt. It was located between the first and the second cataract of Aswan. In that time the region was known as Wawat. The Southern portion of Nubia located south the second cataract was known as upper Nubia. Next to Nubia is located next to one of the most important archaeological sites in Egypt. We are talking about Abu-Simbel, where Pharo Ramses II built important buildings that are one of the main touristics attractions of Egypt.
