What does the following code find? vl= {1, 2, 3, 4}; v2 ={3,6,4}; Do[If [!MemberQ[v2,v1[[i]]], v2=Append[v2, vl[[i]]]],{i,1, Length[vi]}]; Print[v2]; O Finds the union of two vectors v1 and v2 O It finds the elements in v1 that are not in v2. O It finds the intersection of the two vectors v1 and v2 O None of the choices