Final answer:
The 'd command' followed by a state's name as an argument should print out relevant state information in a command-line or scripting context.
Step-by-step explanation:
When the d command is followed by an argument that represents the valid name of a state, the expected behavior would be to print out information associated with that state. This scenario typically appears in the context of a command-line interface or a scripting environment where commands are issued to perform specific tasks. In programming, a command followed by its arguments directly contributes to the function or action being executed. For instance, if there is a script designed to retrieve data associated with different states, using the 'd command' followed by the name of a state as an argument should trigger the script to access and print out the relevant information for the provided state's name.