[单选题]
The DNA sequence shown has been taken fromk zqls70y qd j6 r b+5nta9oj(*)9q1odb5lzwj exon 1 of DNA 4m0aoit uv y+1wj3+ dmwithin the human insulin gene. Which sequence corresponds to a deletion mutation in thmyiv+uom 40t+ad 1wj 3e sequence?
A. TACAAGGACAAGCTGCAT
B. TACAAGAGACAAGCTGCA
C. TACAAGGAAAGCTGCATC
D. TACAAGGACAAGCGGCAT