What happens if the ui.json file is empty?

What happens if the ui.json file is empty?
A . You create a text-only version of an app.
B. The templatewill not include a configuration wizard.
C. The dataflow fails.
D. The app includes all possible dashboards by default.
E. B and D

Answer: B

Explanation:

https://trailhead.salesforce.com/en/content/learn/modules/wave_analytics_templates_intro/wave_analytics_templates_structure