Respuesta :
The correct answer to this question is D. The reson is that indulgence, is defined as certain tolerance or leniency to judge other person´s behavior, or misbehavior, such as that of the sullen boy, who did not feel any gratitude to the speaker´s master.
Regarding options A,B and C,they do not really match the meaning of indulgence in the sentence.
Answer:
D) willingness to be lenient rather than strict
Explanation:
The master of the house was willing to let the boy get away with many things and showed him favoritism, but the boy never returned thanks.