The Blood Types for 40 People Who Agreed to Participate

The blood types for 40 people who agreed to participate in a medical study were as follows.
$$\begin{array} { l l l l l l l l l l } \mathrm { O } & \mathrm { A } & \mathrm { A } & \mathrm { O } & \mathrm { O } & \mathrm { AB } & \mathrm { O } & \mathrm { B } & \mathrm { A } & \mathrm { O } \\\mathrm { A } & \mathrm { O } & \mathrm { A } & \mathrm { B } & \mathrm { O } & \mathrm { O } & \mathrm { O } & \mathrm { AB } & \mathrm { A } & \mathrm { A } \\\mathrm { A } & \mathrm { B } & \mathrm { O } & \mathrm { A } & \mathrm { A } & \mathrm { O } & \mathrm { O } & \mathrm { B } & \mathrm { O } & \mathrm { O } \\\mathrm { O } & \mathrm { A } & \mathrm { O } & \mathrm { O } & \mathrm { A } & \mathrm { B } & \mathrm { O } & \mathrm { O } & \mathrm { A } & \mathrm { AB }\end{array}$$
Construct a frequency distribution for the data.

A)
$\begin{array}{cc}\text { Blood type } & \text { Frequency } \\\hline \mathrm{O} & 18 \\\mathrm{~A} & 14 \\\mathrm{~B} & 5 \\\mathrm{AB} & 3\end{array}$

B)
$\begin{array}{cc}\text { Blood type } & \text { Frequency } \\\hline \mathrm{O} & 19 \\\mathrm{~A} & 13 \\\mathrm{~B} & 5 \\\mathrm{AB} & 3\end{array}$


C)
$\begin{array}{cc}\text { Blood type } & \text { Frequency } \\\hline \mathrm{O} & 19 \\\mathrm{~A} & 11 \\\mathrm{~B} & 5 \\\mathrm{AB} & 2\end{array}$

D)
$\begin{array}{cc}\text { Blood type } & \text { Frequency } \\\hline \text { O } & 20 \\\text { A } & 13 \\\text { B } & 4 \\\text { AB } & 3\end{array}$