The correct answer is A. 15423.
The first option, “policy,” is the most general term. It could refer to any type of policy, from government policy to company policy to personal policy. The second option, “the,” is a definite article. It specifies that the policy being discussed is a specific policy, not just any policy. The third option, “best,” is an adjective. It describes the policy as being the most effective or desirable. The fourth option, “is,” is a verb. It states that the policy is in effect. The fifth option, “honesty,” is a noun. It refers to the quality of being honest.
Option B, 25431, is incorrect because it puts the word “best” before the word “policy.” This is not grammatically correct. Option C, 25314, is incorrect because it puts the word “honesty” before the word “policy.” This is not grammatically correct. Option D, 54231, is incorrect because it puts the word “is” after the word “policy.” This is not grammatically correct.