Which of the Following Explains the Difference Between Variable Number

Which of the following explains the difference between variable number tandem repeats (VNTRs) and restriction fragment length polymorphisms (RFLPs) ?

A) In VNTRs, we are looking at sequence differences in genes; in RFLPs, we are looking at sequence differences in noncoding DNA.
B) In VNTRs, we are looking at sequence differences in noncoding DNA; in RFLPs, we are looking at sequence differences in genes.
C) In VNTRs, we are looking at the number of times a sequence is repeated; in RFLPs, we are looking at size differences resulting from the presence of different restriction sites.
D) In VNTRs, we are looking at size differences resulting from the presence of different restriction sites; in RFLPs, we are looking at the number of times a sequence is repeated.