Final answer:
The one option that is not an advantage of cloud computing is 'Unknown data processing location' due to potential regulatory and security concerns.
Step-by-step explanation:
The question addresses the advantages of cloud computing, which include the ability to access the required computing power, paying only for the resources that are used, and having flexible, short-term contracts. However, one listed item is not an advantage: Unknown data processing locations. This is considered a disadvantage due to potential issues with data sovereignty, privacy, and compliance with local laws. In the context of cloud computing, knowing where your data is processed and stored is important for regulatory and security reasons.