| A | B | C | |
| Mean | 280 | 280 | 290 |
| Variance | 20 | 16 | 16 |
13. A school will select one person from three candidates (A, B, C) to participate in the city-wide middle school boys' 1500-meter race. The mean and variance of their 10 recent training times (in seconds) are shown in the following table:
\begin{center}
\begin{tabular}{ | c | c | c | c | }
\hline
& A & B & C \\
\hline
Mean & 280 & 280 & 290 \\
\hline
Variance & 20 & 16 & 16 \\
\hline
\end{tabular}
\end{center}
Based on the data in the table, the school should select \_\_\_\_ to participate in the race.