Why Should the Medical Assistant Proofread All Letters, Memos, or Other

Why should the medical assistant proofread all letters, memos, or other documents that will be distributed?

A) The computer cannot add proofreader's marks.
B) It isn't necessary; the computer spell check function will correct all misspelled words.
C) The physician or other individual who composed the letter may want to make changes.
D) The computer spell check function cannot verify that a word is used in its correct context.