this question

In the DNA sequences shown below, which choice(s) highlight(s) the best PCR primer target sites that could be used to detect polymorphisms in the length of the simple sequence repeat region in different individuals? 1) TAAAGGAATCAATTACTTCTGTGTGTGTGTGTGTGTGTETGTGTTCTTAGTTGTTTAAGTTTTAAGTTGTGA ATTTCCTTAGTTAATGAAGACACACACACACACACACACACACAAGAATCAACAAATTCAAAATTCAACACT i) TAAAGGAATCAATTACTTCTGTGTGTGTGTGTGTGTGTGTGTGTTCTTAGTTGTTTAAGTTTTAAGTTGTGA ATTTCCTTAGTTAATGAAGACACACACACACACACACACACACAAGAATCAACAAATTCAAAATTCAACACT i) TAAAGGAATCAATTACTTOTGTGTGTGTGT sequence GTGTGT TAGTTGTTTAAGTTTTAAGTTGTGA C) ATTTECTTAGTTAATGAAGACACACACACACACACACACACACAAGAATCAACAAATTCHAAATTCAACACT sequence (a) sequence (b) sequence (c) both sequence (a) and sequence (b)