What MDM configuration is needed to meet this requirement?

Your Security Officer ran the Security Health Check and found the alert that “Installation of mobile applications from unknown sources” was occurring. They have asked you to find a way to prevent that from happening.

Using Mobile Device Management (MDM), you need to configure a policy that will not allow mobile applications to be installed from unknown sources.

What MDM configuration is needed to meet this requirement?
A . In the Application Management menu, configure the whitelist of apps that Android and iOS devices are allowed to install.
B . In the Application Management menu, configure the whitelist of apps that Android, iOS devices, and Active Sync devices are allowed to install.
C . In Android Settings, ensure that “Allow non-Play Store apps from unknown sources installation” is unchecked.
D . In Device Management > Setup > Device Approvals menu, configure the “Requires Admin approval” option.

Answer: C

Explanation:

Reference: https://support.google.com/a/answer/7491893?hl=en