When two vehicles enter an intersection from different highways at the same time, which vehicle must yield?

Answer: B — The driver on the right

When two vehicles enter an intersection from different highways at the same time, the vehicle on the right must yield. This is because vehicles entering from the right typically have the right-of-way over vehicles entering from the left. Option A is incorrect because the direction in which the driver is coming from (left or right) does not determine who has the right-of-way. Option C is incorrect because even if one car entered the intersection slightly before the other, the vehicle on the right still has the right-of-way. Option D is incorrect because the size of the vehicle does not determine who has the right-of-way in this situation. Yielding in an intersection is based on traffic laws and not the size of the vehicles involved.