Question

Which sentence is punctuated correctly?

A) Marianne ended up revising her report three times she looked first at the
content, then she considered her thesis, and finally she considered
questions of style.
B) Marianne ended up revising her report three times she looked first at the
content: then she considered her thesis, and finally she considered
questions of style.
C) Marianne ended up revising her report three times she looked first at the
content, then she considered her thesis: and finally she considered
questions of style.
D) Marianne ended up revising her report three times: she looked first at the
content, then she considered her thesis, and finally she considered
questions of style.

Answer 1

D) Marianne ended up revising her report three times: she looked first at the content, then she considered her thesis, and finally she considered questions of style.

This is correct