In August, the Williamstown main city parking garage was completely full every single day of the month. This phenomenon indicates that the main city parking garage in Williamstown is a popular place for parking. therefore, the Williamstown parking garage will be full every day of the month for September. Which of the following, if true, cast the most doubt on the conclusion above? ['Capeville, a neighboring city, has only one parking garage, though it was not filled every day of the month.', 'In July, the Williamstown parking garage was full every day of the month.', 'Williamstown is popular beach town and tourists across the nation flock to its beaches from June to August, but the city becomes virtually empty come September.', 'The Grand Hotel, a popular hotel in Williamstown, expects to have a full garage the entire month of September.']