Discussion
The yawing moment due to roll rate is normally negative on a conventional wing because
Answer: D
Rolling raises the local incidence of the down-going wing, which gains lift and with it induced drag, so the nose is dragged away from the direction of roll. That is adverse yaw seen as a derivative rather than as an aileron effect, and it is one reason a roll input generates sideslip. The fin's sideslip angle is a consequence, not the cause. Dynamic pressure barely changes in a small-perturbation roll. Fuselage side force arises from sideslip, which is a different derivative altogether.
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