Save the image to the phone's SD card by accessing the external storage

Question

I want to save a user's password. Which of these solutions does NOT allow me to do it securely?

Accepted Answer

Save it on the phone's SD card by accessing the external storage

Answer

Save it on a server via an internet connection using the HTTPS protocol by sending the password in the body of the request (PUT / POST)

Answer

Encrypt it and save it in a SQLite database in the application's internal storage area

Answer

Save it in the application's SharedPreferences with an encryption key

Question from the Android test