Question: When passing an argument by-reference to a function: A. The copy constructor is invoked B. The copy constructor is invoked only if the argument is

When passing an argument "by-reference" to a function:

A. The copy constructor is invoked

B. The copy constructor is invoked only if the argument is also defined as const

C. The copy constructor is not invoked

D. The copy constructor is not invoked only if the argument is also defined as const

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