Which of the following is an aspect of data integrity?

Data integrity refers to the accuracy, consistency, and reliability of data throughout its lifecycle. An important aspect of maintaining data integrity is ensuring that data is protected against unauthorized alterations. This is crucial because if unauthorized changes are made, the data can become corrupted, misleading, or invalid, which undermines its reliability for decision-making and analysis.

While consistent formatting of data contributes to clarity and usability, it does not directly ensure integrity. Unrestricted access for all users poses a risk to data integrity, as it allows anyone to potentially alter the data without necessary permissions or oversight. Quick retrieval from cloud services, while improving efficiency and access, does not inherently relate to the validity or reliability of the data itself.

Thus, the emphasis on protection against unauthorized alterations is fundamental to maintaining data integrity, making it the correct answer.