Answer: Semi-strong-form efficient.

In a **semi-strong-form efficient market**, security prices fully reflect all publicly known and available information, which aligns with the given scenario. - **Option A (Weak-form efficient)**: Incorrect because weak-form efficiency only reflects past market data, not all publicly available information. - **Option C (Strong-form efficient)**: Incorrect because strong-form efficiency includes both public and private information, which exceeds the given condition. This question contrasts the three forms of market efficiency: weak-form, semi-strong-form, and strong-form.

Author: LeetQuiz Editorial Team