24. The diagram shows a map of a park. The park is divided into regions. The number inside each region gives its perimeter, in $\mathrm{km}$. What is the outer perimeter of the park?
A $22 \mathrm{~km}$
B $26 \mathrm{~km}$
C $28 \mathrm{~km}$
D $32 \mathrm{~km}$
E $34 \mathrm{~km}$