C. They provide additional detail for the presenter to use as speaking cues is the correct answer.
C is the answer some may say otherwise but the key word(s) that make it an opinion to be argued are; inadequate. That word is a big red flag showing its an opinion. not all people think Rhodes so called small gestures are inadequate.
The narrator is a cloud William Wordsworth is comparing his perspective to a clouds. An alter ego of himself.