The correct answer is: B. humility.
Sarita did not heed the disdain she had to bear at the hands of her step-mother. This means that she did not pay attention to the disrespect that her step-mother showed her. She was humble enough to accept that her step-mother did not like her, and she did not let it bother her.
The other options are incorrect because they do not describe Sarita’s attitude towards her step-mother.
A. Penitence is a feeling of regret or remorse for one’s sins. Sarita did not feel regret or remorse for anything she had done to her step-mother.
C. Love is a feeling of deep affection or fondness. Sarita did not love her step-mother.
D. Admiration is a feeling of respect or approval. Sarita did not admire her step-mother.