Which of the following security policies is BEST to use when trying to mitigate the risks involved with allowing a user to access company email via their cell phone？（）

• A、The cell phone should require a password after a set period of inactivity.
• B、The cell phone should only be used for company related emails.
• C、The cell phone data should be encrypted according to NIST standards.
• D、The cell phone should have data connection abilities disabled.