An organization is implementing a new identity and access management architecture with the following objectives:

$$ Supporting MFA against on$-$premises infrastructure

$$ Improving the user experience by integrating with SaaS applications

$$ Applying risk$-$based policies based on location

$$ Performing just$-$in$-$time provisioning

Which of the following authentication protocols should the organization implement to support these requirements?

A$.$ Key sharing

B$.$ Key distribution

C$.$ Key recovery

D$.$ Key escrow