1) If my memory serves me well, correct answer is: Using a single formatting C. Style helps to make reading researched information easier. Styles helps to quickly sort out the titles, paragraphs and so on. Single formatting style allows you to make the document more authentic. It easier to use styles fucntion than sort the paragraphs and titles manually.
2) I am definitely sure that the answer is: D. Material that will capture the reader's interest. This kind of material is called "hook", as it's catches the reader on a hook and he gets interested with your work. It's the most important thing when you create a writing plan.
3) Parallel construction or parallel structure is the words, phrases which have the same gramatical structure. According to that, I'd go with: B." Being happy," " being sad," and " being depressed". The structure consists of word "being" and the adjective. It's a good example of parallel structure.
4) In my view, this one fits the best: B. Education can change a person's life. Sentence outline is a thesis which reflects and supports a paragraph written below. It's used to show the main idea of the paragraph in one sentence and offers another idea to discuss.
