I would think a unit of speech is the word...word. Letters make up a word. One word is not a sentence.
First hand point of view. First hand point of view is when the narrator is telling the story about something he/she experienced.
The answer should be A because you should NEVER have cliches, always always always have specific examples and indentations are not that important as length of sentences are, never have a run on or a 2 word long sentence.