The new kingdom began to decline around 1200 bce, but what event ultimately brought the era to a close?
conquered lands rejected egyptian rule.
the kush conquered egypt.
the hyksos conquered egypt.
the ruling dynasties weakened.

The correct answer is "The Kush conquered Egypt".

Explanation:

The New Kingdom was the period of Egypt Empire that lasted between the 16th century BC and the 11th century BC. The New Kingdom had multiple inner problems, which empowered the Kingdom of Kush located at the Sudanese and southern Egyptian Nile Valley. From 760 to 656 BCE, the Kush  conquered Egypt, which marked the end of The New Kingdom era.

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explanation:

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