Which statement best differentiates a pointer from a reference in C++?

Which statement best differentiates a pointer from a reference in C++?

• A. A pointer stores a memory address; a reference is an alias to an existing object.
• B. Pointers store a memory address; references store memory addresses.
• C. References can be null; pointers cannot be null.
• D. Pointers cannot be copied; references can be copied.

Answer: (A)