Functions can be declared to return a reference type. There are reasons to make such a declaration/Which of the following reasons are correct? The information being returned is a large enough object that returning a reference is more efficient than returning a copy. The type of the function must be a R-value.

• Only 1 is correct.
• Only 2 is correct.
• Both 1 and 2 are correct.
• Both 1 and 2 are incorrect.