When A drives along the highway and B waves for him to go ahead, does A have permission to use B's driveway?

The choice indicating that A is justified in acting on apparent consent is correct because it reflects the principle of implied consent in tort law. In this situation, B's gesture of waving for A to go ahead can be interpreted as an invitation to proceed, indicating that B does not object to A using the driveway. Under the circumstances, such nonverbal communication can establish a reasonable belief that A has permission to enter or use the driveway.

In tort law, actual consent can be explicit or implicit. Since B’s gesture can reasonably be understood to communicate consent, A is justified in relying on that apparent consent to use the driveway without needing to seek additional confirmation. This aligns with the principle that actions can convey permission, especially in situations where a gesture is clear and straightforward.

Looking at the other choices, the assertion that B's gesture was a denial of permission contradicts the act of waving someone to go ahead, which is generally interpreted as an invitation. The idea that A should have asked for explicit consent overlooks the fact that the gesture provided a sufficient basis for A's assumption of permission. Lastly, the notion that A has permission simply because he was already driving does not take into account the context of B’s communicative action, which indicates that the expectation and understanding