Under what condition does stall speed typically increase?

The stall speed of an aircraft is the minimum speed at which the aircraft can maintain level flight. When an aircraft pulls out of a dive, several aerodynamic factors come into play that can increase stall speed.

As the aircraft pulls out from a dive, it experiences an increase in angle of attack (AoA) as the pilot pulls back on the control stick or yoke to regain level flight. The increase in AoA can cause the wing to reach its critical angle of attack sooner, leading to a stall. Additionally, while in a dive, aircraft may have a higher weight loading due to increased speed and changes in lift dynamics; when the pilot initiates the pull-up, the lift equation indicates that more speed (or higher performance) is necessary to maintain that lift at the increased AoA, thus increasing the stall speed.

In summary, the change in flight dynamics and the associated increase in angle of attack while pulling out of a dive lead to an increase in stall speed, making this the correct choice.