[单选题]
The DNA sequence shown has been taken from ex*ti f 1bjghb.8onp,/tac)) cjh bcckpx (ff2)+b 1 of DNA within the human insulin gene. Which sequence corresponds to a deletion mutation in th ())c/j ctbk bxcf)2ppc a+f,he sequence?
A. TACAAGGACAAGCTGCAT
B. TACAAGAGACAAGCTGCA
C. TACAAGGAAAGCTGCATC
D. TACAAGGACAAGCGGCAT