If AddressList Exists and Has Values Stored in It and AddrList

Multiple Choice

If addressList exists and has values stored in it and addrList is an array with values stored in it, what will be the results when the following code is executed?
AddressList.setListData(addrList) ;

A) The values of addrList will be attached at the end of the current addressList.
B) The values in addressList will be replaced by the values in addrList.
C) The values of addrList will be inserted at the beginning of the current addressList.
D) addressList will be unchanged.