I'd say the answer is C. Hope I helped!
The underlined phrase is OF A SUNSET.
The underline phrase functions as an ADJECTIVE PHRASE.
An adjective is a word which modifies a noun. An adjective phrase also modifies a noun. Thus, the underlined phrase in the given sentence modifies the noun 'picture'.
Jane had recurring dreams of Mr. Rochester which bothered her the most when she arrived at school in Morton.
Studies have shown that warmer classrooms usually have lower performing students, while colder classrooms usually have higher performing students. The cold air usually keeps you awake.