Final answer:
In the calculation of Ad Rank, factors such as ad relevance, bid amount, and CTR are considered, while weather conditions are not.
Step-by-step explanation:
The factors considered by Ad Rank in its calculation include the relevance of the ad to the search query (ad relevance), the amount of money bid for the ad placement (bid amount), and the historical clickthrough rate (CTR) of the ad. Weather conditions are not a factor in Ad Rank's calculation. Therefore, the correct answer for which of the listed factors is not considered by Ad Rank in its calculation is d) Weather conditions.