C. "Father's eyes were <em>narrow</em><em> </em><em>slits</em><em> </em><em>of</em><em> </em><em>blue</em><em> </em><em>fire</em> in his white face."
Explanation:
The figure of speech used in the sentence claimed that his eyes were narrow slits of blue fire. Of course, this isn't possible. It is meant to convey the message that Father is angry, hence his eyes being 'narrow slits of blue fire'.
To look objectively is to get an unbiased overview of our field of vision. Subjective seeing speaks more to understanding. When we use the term “I see” we communicate that we understand what something means.