Final answer:
Car A needs to yield to Car B since Car A is turning left and Car B is going straight through the uncontrolled intersection.
Step-by-step explanation:
When two cars arrive at an uncontrolled intersection, the rules of the road dictate priority based on the position and actions of the vehicles. In the scenario described, Car A is turning left and is to the left of Car B, which is going straight. Generally, the right-of-way at an intersection is given to the vehicle that arrives first or to the vehicle that is traveling straight on a through road.
However, since Car A is making a left turn, it should yield to Car B, which is going straight. Hence, the correct option in the final answer is B: Car A is to the left of Car B and therefore must yield.