Which of the following statements about a unique_ptr object is true?
a. A unique_ptr is a “smart pointer” for managing dynamically allocated memory.
b. When a unique_ptr goes out of scope, its destructor automatically returns the managed memory to the free store.
c. You must explicitly delete the memory that’s managed by a unique_ptr before the object goes out of scope.
d. All of the above.
c. You must explicitly delete the memory that’s managed by a unique_ptr before the object goes out of scope.
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