An administrator wants to use constraint tags to deploy cloud templates to a particular storage with a capability tag assigned; however, not all projects have access to this storage.
Which two tag formats can be defined at the cloud template level in order to ensure that cloud templates are deployed on this particular storage, whenever possible, and fail if not available? (Choose two.)
A. value:key
B. key:value:soft
C. !key:value
D. key:value:hard
E. key:value
