A.arrayOf() B.stringOf() C.arrayOfNulls() D.emptyArray()
A.Iterable B.Set C.MutableSet D.Map:key
A.Listlist=newArrayList(); B.valset=hashSetOf(1,7,53) C.vallist=arrayListOf(1,7,53) D.valmap=hashMapOf(1,7,53)