It is important to avoid wordy or unduly long phrases such as due to the fact that or for the reason that and instead use a shorter word like because.

• A. The subject of the sentence (the writing, which is singular) does not agree with the pronoun (they, which is plural)
• B. due to the fact that is wordy and can be replaced by because
• C. the pronoun their, which is plural, does not agree with the subject the writing, which is singular; the phrase is awkward and long
• D. the subject of the sentence (the writing) agrees with the pronoun (it); because is concise