Which of the following is NOT considered a common data source used in data analytics?

When considering common data sources used in data analytics, surveys are indeed a legitimate source; they provide structured data directly from respondents regarding various topics.

APIs, social media, and CRM systems, on the other hand, are widely recognized as sources that offer vast amounts of real-time data. APIs allow for data retrieval from different applications, social media platforms serve as rich repositories of user-generated content and interactions, and CRM systems contain structured data regarding customer relationships.

Surveys may be less frequent in data analytics compared to these other sources, which continuously generate real-time data. However, they are still an important method for capturing specific insights directly from individuals. Therefore, the correct response identifies a misunderstanding of the role surveys play in data analytics, as they are a valid data source despite being less common in certain contexts.