Answer:
B. 0
Explanation:
We have two opposite forces in x, direction. Both with equal magnitude.
If we made summatory in X, we have,
[tex]\sum F_x = 0[/tex]
[tex]F_{Athlete1}-F_{Athlete2}=0[/tex]
[tex]200-200=0[/tex]
[tex]0=0[/tex]
Therefore the net force on the system is 0 ponds.