问题如下：
Which of the following statements is most accurate?
选项：
A. Core inflation is less subject to short-term market conditions.
B. Headline inflation is calculated based on a price index of goods and services expect food and energy.
C. Core inflation is calculated based on a price index that includes all goods and services.
解释：
A is correct.
Headline inflation is affected by food and energy price fluctuations which are determined by short-termmarket conditions. Therefore, it is more subject to short-term market conditions than core inflation.
考点：Other Inflation Measurements
解析：因为相比较Headline inflation，core inflation 剔除了食品和能源价格的影响，能源和价格本身受到短期市场的冲击比较大，所以A选项正确。
Headline inflation本身是包含能源和食品价格的，所以B选项错误。
core inflation 剔除了食品和能源价格的影响，所以C选项错误。
请问下A选项增么理解呢？
