Which of the following speeding offenses is the most serious and can lead to license revocation?

Option C involves driving at 55 mph or faster in a 35 mph zone, which constitutes a significant violation of the traffic laws. This type of offense is classified as reckless driving or a severe speeding violation, as it exceeds the speed limit by a considerable margin (20 mph or more) and places both the driver and others on the road in greater danger.

In North Carolina, such serious violations are treated with heightened penalties. The specific circumstances of driving at such high speeds in a zone where the limit is much lower demonstrate a blatant disregard for speed regulations and public safety. The potential consequences for this offense can include not only monetary fines but also points added to the driving record, which can lead to license revocation if accumulated to a certain level.

In contrast, exceeding the speed limit by lesser amounts, such as 10 mph, 15 mph, or even 20 mph, typically does not carry the same risk of license revocation unless repeated or accompanied by other violations. This sets option C apart as the most serious speeding offense among the provided choices.