Option C is correct because according to the textbook context, VNTRs (Variable Number Tandem Repeats) are found within the non-coding regions of an individual's genome. The text explicitly states that 'Within the non-coding regions of an individual's genome, there exists short sequences of nucleotides which are repeated a number of times in tandem called STR (short tandem repeats) at a locus which are called VNTR.' This clearly indicates that VNTRs are: (1) repetitive - they are sequences repeated a number of times in tandem, (2) non-coding - they exist in non-coding regions of the genome, and (3) short DNA sequences - described as short sequences of nucleotides. Options A, B, and D are incorrect because they either describe VNTRs as coding sequences or non-repetitive sequences, which contradicts the textbook definition.