Which of these is the incorrect method for an Application to save local data?

Which of these is the incorrect method for an Application to save local data?
A . Extend PreferencesActivity and save in an XML file.
B . Save as a file in the local file system.
C . Save in the database using SQLite.
D . Save in the hash table file using the Dictionary class.

Answer: D

Explanation:

Incorrect:

B: You can save files directly on the device’s internal storage.

C: Android provides full support for SQLite databases. Any databases you create will be accessible by name to any class in the application, but not outside the application.

Reference: http://developer.android.com/guide/topics/data/data-storage.html