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____________________ parameters are useful in three situations: • When the value of the actual parameter needs to be changed • When you want to return more than one value from a function • When passing the address would save memory space and time relative to copying a large amount of data

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Answer:

The correct word for the blank space is: Reference.

Explanation:

In C++, Reference Parameter is a type of parameter that does not need additional storage since it represents an already existing function.  The function has the characteristic of passing more than one (1) variable. Reference parameters are also used to edit the existing parameter or when referencing a function saves storage compared to creating a new function.