If a memory block is not freed, (A) a memory leak occurs, (B) a dangling pointer is created, (C) it is automatically cleared on program termination, (D) B and C, (E) A and C. realloc returns a pointer...

If a memory block is not freed, (A) a memory leak occurs, (B) a dangling pointer is created,

(C) it is automatically cleared on program termination, (D) B and C, (E) A and C.

realloc returns a pointer (A) to the existing allocated block, (B) that is different from the

existing block, (C) that may or may not be different from the existing block, (D) that may be

NULL, (E) C and D.