Contextual information quality is defined as:

Contextual information quality refers to how relevant and appropriate the data is to the user's specific context and needs. This means that it is not enough for data to be just accurate; it must also be meaningful and applicable to the situation at hand. When the context in which data is used aligns with the user's requirements and expectations, the effectiveness of the information is significantly enhanced.

Option C emphasizes this alignment, highlighting how application relevance based on user context plays a critical role in determining the quality of information. It takes into account the purpose for which the data is being used and the specific circumstances surrounding its use, which validates its contextual quality.

The focus on user context distinguishes this concept from other aspects of data quality, such as accuracy or ease of access, which do not inherently ensure that the information is suitable for a particular decision-making process or circumstance. In modern data-driven environments, where users need to quickly interpret data and make informed decisions, understanding the relevance of that data in context is vital for its successful application.