Final answer:
To customize a Power BI Desktop project with corporate colors and custom icons, you should import a theme from an external source and use custom icons by importing them into your visualizations.
Step-by-step explanation:
To customize a corporate Power BI Desktop project with corporate colors and a set of custom icons, you should import a theme from an external source (option b). This allows you to apply a consistent color scheme throughout the report, which matches your organization's corporate identity. Power BI supports the customization of themes, where you can define the color palette and apply it across all visuals in a report. Additionally, you can use custom icons by importing them into your visualizations, ensuring a consistent and branded look for your reports.
To import a theme, go to the 'View' menu in Power BI Desktop, and then select 'Themes' > 'Browse for themes'. After selecting and opening your theme file, the color scheme will apply to your entire report immediately. For custom icons, you can employ 'Shapes' or 'Images' in Power BI, importing your specific icons and using them in your report visuals.