Which format is best suited for organizing customer complaints recorded in text format, including emails and social media messages?

Customer complaints in text form, such as emails and social media posts, fall under unstructured data. This format lacks a fixed organizational framework, making it difficult to store in a tabular or relational database without transformation. Text data requires advanced techniques, like natural language processing (NLP), to extract insights, as it doesn’t follow a pre-set structure like structured data or partially organized format like semi-structured data. Organizations typically use big data tools to manage and analyze unstructured data due to its complex nature. Option A is incorrect as structured data has predefined fields and is unsuitable for raw text data. Option B is incorrect because semi-structured data has some inherent organization (like JSON or XML) which doesn’t fit plain text. Option D is incorrect because relational databases handle structured data well, but unstructured data requires different tools. Option E is incorrect since numerical data lacks relevance to raw textual information.