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In the gene TATTCATTGTTA—TGATTT—ATTCG, CATTGTTA encodes for pepsin, a digestive enzyme. The rest of the sequence doesn’t code for any protein. Which sequence contains a mutation that will affect the formation of pepsin?

A. TATTCATTCATTA—TGATTT—ATTCG
B. TATTCATTGTTA—TGACTTT—ATTCG
C. TATTCATTGTTA—TGATTT—ATTGGCG
D. TATTCATTGTTA—TGAT—ATTCG
E. TGCATTCATTGTTA—TGATTT—ATTCG