<prompt> Chagua mageuzo bora zaidi hadi kwa predicate logic. Some firefighters rescue victims from danger. Dx: x is danger; Fx: x is a firefighter; Vx: x is a victim; Rxyz: x rescues y from zA. xFx yDy zVz Rxyz B. xFx yVy zDz Rxyz C. xFx yzVy Dz Rxzy D. xFx yVy . zDz Rxyz  <response>: <reason> B 