Last Year, Nine Employees of an Electronics Company Retired $\begin{array} { l l l l l l l l l } 51 & 61 & 62 & 57 & 50 & 67 & 68 & 58 & 53 \end{array}$

Last year, nine employees of an electronics company retired. Their ages (in years) at retirement are listed below. Find the mode(s) for the given sample data. $\begin{array} { l l l l l l l l l } 51 & 61 & 62 & 57 & 50 & 67 & 68 & 58 & 53 \end{array}$

A) 51 yr, 61 yr, 62 yr, 57 yr, 50 yr, 67 yr, 68 yr, 58 yr, 53 yr
B) $58.6 \mathrm { yr }$
C) $58 \mathrm { yr }$
D) no mode