In 58 BCE, Rome annexes this territory, which had long been part of the Kingdom of Egypt.A.NubiaB.CarthageC.CyprusD.Syria

The territory that Rome annexed in 58 BCE, which had been part of the Kingdom of Egypt, is A. Nubia.

Nubia, located to the south of Egypt along the Nile River, was historically significant and had interactions with ancient Egypt for centuries. The Romans expanded their territories to include parts of this region as they sought to consolidate power and control over the Nile and trade routes linked to Egypt.

The other options, Carthage, Cyprus, and Syria, do not fit this historical context, as they were associated with different events and periods in Roman expansion. Carthage was famously involved in the Punic Wars, Cyprus was annexed later, and Syria was annexed in 64 BCE under Pompey the Great. Therefore, Nubia is the correct answer related to the Roman annexation in 58 BCE.