Which of the salesforce app providers will be able to unlock a locked user with their phones?

Which of the salesforce app providers will be able to unlock a locked user with their phones?
A . All of them.
B . iOS (App Store)
C . Only those that download the app from the App Exchange.
D . Android (Google Play)

Answer: A

Explanation:

All of the salesforce app providers will be able to unlock a locked user with their phones. The Salesforce app is available for iOS (App Store), Android (Google Play), and Windows 10 devices, and it allows users to unlock themselves using biometric authentication or a verification code sent to their email or phone number.

Reference: https://help.salesforce.com/s/articleView?id=sf.mobile_app_unlock.htm&type=5