What does this road sign along with a flashing yellow signal indicate?

• Drivers must turn left at the intersection ahead.
• Drivers must come to a complete stop before the sign.
• Drivers must prepare to stop at the traffic lights ahead.
  Explanation:

  "The flashing yellow signal warns drivers to slow down and be ready to stop at upcoming traffic lights. This ensures that drivers exercise caution at the intersection."
• None of the above