The best answer to complete the sentence "Two advantages of a confederation are that it" is:
- Prevents abuse of power by a national government; preserves local identity
Explanation: In a confederation, power is decentralized, meaning that individual states or regions retain significant autonomy. This prevents a central national government from accumulating too much power and potentially abusing it. Additionally, by preserving local identity, a confederation allows different regions or states to maintain their unique characteristics and cultures without being overshadowed by a strong centralized authority.