<h3>I don't think it's C, but I think it's A, the unification of Egypt. </h3>
Explanation:
Here's my point in believing that C is incorrect. Memphis is the city where the capital was established. It only was destructed around 1070 BCE. Lower and Upper Egypt battled around 3100 BCE, which is 1500 BCE (years) earlier than the destruction of memphis. I believe it is A because in my notes, it is said that Lower Egypt conquered Upper Egypt, by Menes, which unified Egypt.