问

问题如下：

Which of the following statements is the best description of the characteristics of economic indicators?

选项：

A.Leading indicators are important because they track the entire economy. B.Lagging indicators in measuring past conditions do not require revisions. C.A combination of leading and coincident indicators can offer effective forecasts.

解释：

Although no single indicator is definitive, a mix of them—which can be affected by various economic determinants—can offer the strongest signal of performance.

中文解析：

虽然没有一个指标是确定的，但它们的组合——可能受到各种经济决定因素的影响——可以提供最强烈的表现信号。