consider two relations R(A,B,C) and S(B,D) with R contains 5000 tupples stored in a sequential file sorted on attribute A and S contain 10000 tupples stored in a sequential file sorted on attribute B.Each block can hold 10 R tuples or 10 S tupples.which one of the following is most appropriate for answering query R join S?
A)A dense index on R.B
B)A sparse index on R.B
C)A dense index on S.B
D)A sparse index on S.B
