Final answer:
The reference map shown after a map submission provides feedback and suggestions, helping users learn from their performance and understand correct geographic information.
Step-by-step explanation:
In the context of geographic information systems (GIS) and online mapping quizzes or exercises, the reference map displayed after you submit your map is intended to serve as a tool for feedback and suggestions. This means that the correct answer to your question is D. Feedback and suggestions. The reference map typically shows the correct locations or information for you to compare against your own submissions. This allows you to visually assess your performance, understand any mistakes, and learn the correct information for future reference. It is not specifically a score sheet, but it assists in understanding and improving upon your geographical knowledge.