Read the excerpt below and answer the question.
Marie St. Clare had taken no notice of the child s gradually decaying health and strength, because she was completely absorbed in studying out two or three new forms of disease to which she believed she herself was a victim, It was the first principle of Marie s belief that nobody ever was or could be so great a sufferer as herself; and, therefore, she always repelled quite indignantly any suggestion that any one [sic] around her could be sick.
Based on this excerpt, which of the following best describes Marie St. Clare?
A. Egotistical
B. Anxious
C. Naive
D. Misled