What is the function of the void *realloc(void *str, size-t size);?

• A. allocates space for an array of str objects, each of whose size is size
• B. allocates space for an object whose size is specified by size and whose value is indeterminate
• C. changes the size of the object pointed to by str to the size specified by size
• D. causes the space pointed to by str to be deallocated, that is, made available for further allocation