The correct command to verify the CPUSE (Check Point Update Service Engine) version is:

Option B is incorrect because it uses the "[Expert@HostName:0]#" prompt, which is typically used for expert mode commands, but the CPUSE version can be checked using the "show installer status build" command in standard mode.

Option C is incorrect because it uses the "[Expert@HostName:0]#" prompt, and while it includes the "build" parameter, it's not the standard command to check the CPUSE version.

Option D is incorrect because it uses the "HostName:0>" prompt, but it lacks the "show" command and uses "build" instead of "status build."

References: Check Point Certified Security Expert R81 documentation