Which of the following defines a marketing information system?

A marketing information system (MIS) is fundamentally a framework that is designed for gathering, storing, and analyzing marketing data. This involves a systematic approach to collecting information from various sources, ensuring that the data is relevant and reliable, and processing it in a way that can support decision-making in marketing strategies. The effective use of an MIS allows businesses to understand market trends, customer preferences, and the effectiveness of their marketing efforts.

By providing a structured way to handle data, an MIS assists marketers in making informed decisions based on insights derived from analyzed data, thereby enhancing their strategic planning and implementation efforts. This encompasses everything from internal sales data to external market research and competition analysis.

In contrast, the other options do not capture the essence of what a marketing information system is. Some options might suggest operational aspects or evaluative processes, but they don't reflect the comprehensive nature of an MIS, which integrates data gathering and analysis to inform marketing decisions effectively.