What is the purpose of an _intit_.py file ?

What is the purpose of an _intit_.py file ?
A . An_init_.py file sets all magic attributes with the _init_prefix with the appropriate default values.
B . An_init_.py file initializes a Python application with default values for instantiated objects.
C . An_init_.py file contains strings for additional directories that the Python interpreter adds to sys.path [].
D . An_init_.py file indicates to the Python interpreter that a directory contains Python packages or modules.

Answer: B