Sentence Correction (SC) | During the 1890s, while at the same time a student, Willa Cather

A) During the early 1890s, while ((at the same time)) a student, Willa Cather had written - redundancy error

B) While a student in the early 1890s, Willa Cather wrote - correct

C) Willa Cather ((had written)), while ((as)) a student in the early 1890s, - redundancy error

D) Willa Cather wrote, ((as she was a student)) in the early 1890s, - changes meaning

E) While a student in the early 1890s, Willa Cather ((became known)) for her - changes meaning

I