90% sure it's D. And I have to make this answer long or else I can't submit it so that's why I added this whole sentence
Can you give a little more detail ?
Answer:
Explanation:
If a dependent marker word is used, the clause cannot stand alone as a complete sentence. For example: "If she leaves" = not a complete sentence. If an independent marker word is used, the clause can stand alone as a complete sentence. For example: "Therefore, she leaves" = a complete sentence.
Answer:
Abbreviations
Explanation:
You need abbreviations (. , ; ! ?) to have formal writing or else it will be sloppy and hard to read