Question id 15 - Performance and Ground Reference Maneuvers - FAA PPL(A) - Private Pilot Airplane

Performance and Ground Reference Maneuvers - (Refer to Figure 72) What does the vertical line connecting points E and F represent on the airspeed indicator?
The top of the normal operating range.
The top of the white arc.
The red line

Training tests and timed exam simulations FAA PPL(A) - Private Pilot Airplane