A. In the “from-import" form of import, identifiers beginning with two underscores are private and aren't imported.
B. dir() built-in function monitors the items in the namespace of the main module.
C. In the "from-import" form of import, all identifiers regardless of whether they are private or public are imported.
D. When a module is loaded, a compiled version of the module with file extension .pyc is automatically produced.

Solution

C. In the "from-import" form of import, all identifiers regardless of whether they are private or public are imported.