The problem requires integrating data from two different types of sources: a system for daily sales and a social media website for customer satisfaction. Social media platforms and many modern web services expose their data through APIs (Application Programming Interfaces), which commonly follow the REST (Representational State Transfer) architectural style. The Qlik REST Connector is the specific tool within the Qlik ecosystem designed to connect to these web-based data sources, retrieve data, and load it into a Qlik Sense application for analysis. It is the only option presented that can fulfill the requirement of extracting data from a social media website.

B. Microsoft SQL Server: This is a relational database system. While it could be the source for the sales data, it is not a tool for connecting to and extracting data from a social media API.

C. Qlik GeoAnalytics: This is a specialized extension for performing geospatial analysis and creating map visualizations. It does not provide data connectivity to social media platforms.

D. Mailbox IMAP: This connector is designed specifically to retrieve data from email servers using the IMAP protocol and is not applicable for connecting to social media APIs or sales databases.

---

1. Qlik Sense for Windows Help, "REST Connector": This official documentation states, "The Qlik REST Connector is used to load data from a REST data source into a Qlik Sense...app. Many web-based data sources expose data through a REST API." This directly confirms its purpose for connecting to sources like social media websites. (Source: Qlik Sense for Windows Help, Section: "Connecting to data sources / Qlik REST Connector / REST Connector").

2. Qlik Sense for Windows Help, "Creating a REST connection": This section details the process of configuring the connector to access web APIs, including handling authentication methods like OAuth 2.0, which are standard for social media platforms. This demonstrates it is the appropriate tool for the task. (Source: Qlik Sense for Windows Help, Section: "Managing data / Connecting to data sources / Creating a connection / Creating a REST connection").

3. Qlik Sense for Windows Help, "Microsoft SQL Server connector": The documentation for this connector specifies its function is to "connect to a Microsoft SQL Server database." This confirms it is a database-specific connector and cannot connect to a web API. (Source: Qlik Sense for Windows Help, Section: "Connecting to data sources / Qlik ODBC Connector Package / Microsoft SQL Server connector").