Which sign indicates the distance to the nearest runway?

Answer: B — Distance markers noted in hundreds of feet

The correct choice indicates the distance to the nearest runway through specific markers that display numerical values in hundreds of feet. These markers are placed along the taxiways and are crucial for providing pilots and vehicles with situational awareness regarding how far they are from the nearest runway. This information is especially important for maintaining safe distances and planning for any necessary actions when approaching or transitioning to a runway. In contrast, threshold markers are used to indicate the beginning of the runway surface but do not provide distance information. Taxiway signs serve a different purpose, helping with navigation along the taxiways rather than indicating distance. Runway hold signs are focused on providing information related to holding positions rather than distances to the runway itself. Thus, the numerical distance markers are the primary means of conveying the specific distance to the nearest runway, making this choice the most accurate answer.