Under what circumstances may you legally block an intersection?

Answer: C — Under no circumstances

Blocking an intersection is generally not advisable as it can disrupt the flow of traffic and create safety hazards. The law typically prohibits drivers from entering an intersection unless there is enough space on the other side to accommodate their vehicle without obstructing cross traffic. This rule helps to ensure that traffic can continue to move smoothly and safely. While some drivers might think that blocking an intersection is permissible during certain situations, such as rush hour or when turning left, these scenarios do not provide legal justification for obstructing traffic. Even if other vehicles are blocking the intersection, reacting to that situation by also blocking it would not be lawful. This is to prevent a chain reaction of delays and potential accidents. Therefore, the answer that states you may not block an intersection under any circumstances is consistent with traffic laws designed to promote safety and traffic efficiency.