He thought that behavior is determined by its consequences.
We know that either team is winning which means that the cumulative forces (sum of each girl force) on both teams are equal.
This means,

being x the force of the fourth girl on the east team.
Solving to x, you get

The fourth girl on the east is pulling with a force of 220N.
This is called the perihelion.
Answer: The answer is A
Explanation: I took that test already