The following sentence contains either a single error or no error at all. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence contains no error, select choice E.
Among the （A）earliest telescopes （B）were Galilean telescopes, modeled after the simple instruments （C）built by Galileo, the first person （D）having used telescopes to study the stars and planets. （E）No error
(A) earliest
(B) were
(C) built by
(D) having used
(E) No error