Why is setting the coordinate system for the reader in this exercise not strictly necessary?

Why is setting the coordinate system for the reader in this exercise not strictly necessary?

• A. Many spatial formats store information about the coordinate system they are using. If they have this information, FME will use it to set the correct system when you run the workspace.
• B. Setting the coordinate system is not necessary for reprojection.
• C. FME automatically assigns a coordinate system to all data when you run the workspace.
• D. Setting the coordinate system this way will cause errors.

Answer: (A)