Which of the following statements is correct with regard to the operation of the shift valves?

A. The shift valves are operated as a result of the condition of balance between the throttle-A pressure and the governor pressure

B. The shift valves are operated as a result of the condition of balance between the line pressure and the governor pressure

C. The shift valves are operated as a result of the condition of balance between the throttle-A pressure and the line pressure

D. The shift valve are operated as a result of the condition of balance between the spring and the line pressure

Answer: Option A