What does CIG 013V017 indicate in a METAR report?

The notation CIG 013V017 in a METAR report specifically means that the ceiling, or the height of the cloud base above ground level, varies between 1300 and 1700 feet. The "CIG" abbreviation indicates cloud ceiling information, with the numbers following it representing the altitudes in hundreds of feet. The “V” in this context signifies variability, indicating that the ceiling fluctuates between these two heights. Therefore, the correct interpretation confirms that the cloud base is not fixed but rather changes within the specified range, making option A the correct choice.