这道题是啥意思，C0显著不也可以说明方程成立么。

问题如下：

The results depicted in Exhibit 2 are best described as consistent with a regression that has ARCH(1) errors because:

选项：

c₁ is significantly different from 1

c₁ is significantly different from 0

c₀ is significantly different from 0

解释：

We can test whether a time series is ARCH by regressing the squared residuals from a previously estimated time series model on a constant and one lag of the squared residuals (as in Exhibit 2). If the estimate of the slope (c₁ in Exhibit 2) of the regression of the squared residuals on the lagged one period squared residuals is statistically significantly different from 0, the time series is ARCH(1).