The Smallest Value That the Standard Error of Estimate $S _ { \varepsilon }$

Short Answer

The smallest value that the standard error of estimate $S _ { \varepsilon }$ can assume is: $\begin{array}{|l|l|}\hline\text { A. } & -1 \\\hline \text { B. } & 0 . \\\hline \text { C. } & 1 . \\\hline \text { D. } & -2 . \\\hline\end{array}$