In the Optimized Design Experience, Data Analyzer is a new tool that replaces Explorer. Data Analyzer allows you to quickly create ad hoc analysis based on models or datasets. You can use Data Analyzer to explore data, create charts and tables, apply filters and calculations, and save your analysis as stories. Data Analyzer is similar to Explorer, but with some enhancements and new features, such as:

• Support for both models and datasets
• Support for planning models
• Support for story calculations
• Support for linked analysis
• Support for responsive pages

Therefore, the correct answer is Data Analyzer, as it is the tool that replaces Explorer in the Optimized Design Experience

The presentation types for the Digital Boardroom are dashboard and agenda. Dashboard allows users to create a custom layout of widgets and pages on a large screen, such as a wall-mounted monitor or a projector. Agenda allows users to create a structured sequence of pages and topics that can be navigated using a touch screen, such as a tablet or a laptop. Custom and canvas are not presentation types for the Digital Boardroom; they are options that can be used to design dashboard layouts or story pages. Verified References: [SAP Analytics Cloud - Digital Boardroom]

The correct answers are C. Have a clear message and D. Use corporate branding standards. These are some of the guidelines that SAP recommends you follow when you create a story. According to the course material1, “Your current reporting and dashboard standards will suffice for SAP Analytics Cloud stories. And if you do not have reporting or dashboard standards, this is the perfect time to create them.” The course material also suggests that you should “have a clear message and purpose for your story” and "use corporate branding standards to ensure consistency and professionalism"1.

The other options are not mentioned as guidelines in the course material. Option A. Use grouping is a feature that allows you to group data points in a chart or table, but it is not a general design principle. Option B. Avoid pie charts is a common advice for data visualization, but it is not specific to SAP Analytics Cloud stories.

1: Introducing SAP Analytics Cloud Story Design | SAP Training 2