Question: According to NAME_1, how can a state achieve security?
A: By ensuring they have the power to protect themselves from attack, power that is gained either through internal or external balancing.
B: Through the accumulation of territory and other material resources needed to physically defend themselves.
C: By creating an international security environment in which their alliance is fundamentally important to potential aggressors.
D: Through a combination of military and economic measures that secure the state's position as the leader in a competitive international system.
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. Provide your reponse without using the word security.
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