What are some common reasons to manually edit the Registry?

In the following search function for a linked list (using the Node and NodePtr as defined in the text), why is there code to check if here is NULL?

NodePtr search(NodePtr head, int target) { nodePtr here = head; if(here == NULL) { return NULL; } else { while( here->data != target && here->link != NULL) { here = here->link; } if(here->data == target) { return here; } else { return NULL; } } } a. the list may be empty b. the list may be full c. there is no reason for that code to be there d. A and B

You can use queries as the source of the underlying data for another query. _________________________

Answer the following statement true (T) or false (F)