Final answer:
The information provided does not include enough context to accurately determine the average office space cost in San Francisco and Chattanooga in 2013. Thus, it is impossible to select the correct option without further details regarding the common measure used for the cost calculation.
Step-by-step explanation:
The question seems to be missing the context or data necessary to determine what the average office space cost by a common measure was in San Francisco and Chattanooga in 2013. Without additional information, it is not possible to accurately select from the provided options (a through d).
Therefore, no calculation or comparison can be made with the data sets listed in the question. To address the question suitably, more information about the common measure used for determining the office space cost is required.
More clarity on the method used for averaging, whether the costs are per square foot, per month or year, and any specific characteristics of the office spaces considered could also be essential. Only with this information can we match the cost figures to the options provided in the question.