we can try the options replacing and look the equality
A.
[tex]\begin{gathered} \frac{5}{2}=\frac{2}{5}(25) \\ \\ \frac{5}{2}=10 \end{gathered}[/tex]so, A its wrong
B.
[tex]\begin{gathered} 24=\frac{2}{5}(40) \\ 24=16 \end{gathered}[/tex]So, B its wrong
C.
[tex]\begin{gathered} 20=\frac{2}{5}(50) \\ 20=20 \end{gathered}[/tex]So, C is right
D.
[tex]\begin{gathered} 12=\frac{2}{5}(30) \\ 12=12 \end{gathered}[/tex]so, D its right
E.
[tex]\begin{gathered} 4=\frac{2}{5}(10) \\ 4=4 \end{gathered}[/tex]So E, its right
F.
[tex]\begin{gathered} 35=\frac{2}{5}(14) \\ 35=5.6 \end{gathered}[/tex]So, F its wrong
