What should you do when driving through a work zone where no speed limit is posted?

• Drive at a speed above 50 mph.
• Drive at a reduced speed, even if no speed limit is posted, and obey flag persons.
  Explanation:

  "You must drive at a reduced speed through a work zone, even if no speed limit is posted, and you must always obey the flag persons."
• Drive faster to get through the zone quickly.
• Ignore flag persons and continue at your current speed.