Choose the correct statement regarding wake turbulence.

The statement indicating that the primary hazard of wake turbulence is loss of control because of induced roll is correct. Wake turbulence is generated by the passage of an aircraft through the air, producing rotating air masses or vortices that can persist long after the aircraft has flown by. These vortices are particularly risky for smaller aircraft, which can be affected by the induced roll they cause.

When a smaller aircraft encounters these vortices, it can experience a sudden roll or lateral movement, potentially leading to a loss of control. This is particularly critical when an aircraft is unprepared or operating at lower altitudes, such as during takeoff and landing phases, where the effects of wake turbulence can be more pronounced.

Other options do not accurately capture the primary concern surrounding wake turbulence. For instance, while wake turbulence can alter the vertical speed of an aircraft, its most significant impact is on lateral control, rather than merely increasing vertical speed. Additionally, smaller aircraft are indeed affected by wake turbulence, especially when they fly in proximity to larger aircraft. Lastly, wake turbulence is typically most intense during takeoff and landing, rather than during cruise flight, when aircraft are usually separated by greater distances.