Final answer:
The provided text does not reference Medda or her opinion of Jack's artistic skills, so none of the answer options can be confirmed.
Step-by-step explanation:
The excerpt provided does not specifically mention a character named Medda, nor does it address her opinion on Jack's artistic skills. Instead, the text focuses on the narrator's thoughts about an unnamed female artist, scrutinizing her emotional depth and the sincerity within the arts.
The narrator seems conflicted, recognizing her vocal talent but questioning the purpose and emotional significance behind her art. Thus, based on the information given, none of the answer options regarding Medda's views on Jack's art can be confirmed from the excerpt.