Read the excerpt from Frida Kahlo by Hedda Garza.

Despite her pessimism, Kahlo's love of life prevailed. Her broken bones healed, and her spirits improved when she was able to leave her bed and walk. Still in pain and limping, Kahlo decided not to return to school. "I felt I had energies for anything except studying to become a doctor," she wrote in one of her many notes to Gómez.

What does the underlined phrase indicate about the author's feelings toward Frida Kahlo?

A. The author believes that Frida was pessimistic, which made it difficult for her to heal.
B. The author believes that Frida was foolish and should not have left school.
C. The author believes that Frida was strong, even in the face of pain and disappointment.
D. The author believes that Frida was energetic and should have become a doctor.