A polypeptide 5 amino acids long is split into various smaller fragments, and the amino acid sequences of some of the fragments are determined. The identified fragments include: his-gly-ser, ala-his, and ala-ala. Predict the primary sequence of the polypeptide.

A. his-gly-ser-ala-ala

B. ala-his-gly-ser-ala

C. ala-ala-his-gly-ser

You have correctly interpreted the source of the fragments.

D. his-gly-ser-ala-ala

E. cannot be determined without more information.