The correct answer is D. secluded.
The word “secluded” means “to keep or be kept away from other people or from public view.” In the context of the sentence, “Fed up of social atrocities, she finally decided to lead a sequestered life,” the woman is choosing to live a life away from society because she is disgusted by the bad things that people do.
The other options are not correct because they do not accurately describe the woman’s decision. The word “virtuous” means “morally good or excellent.” The word “bold” means “having or showing courage.” The word “enlivened” means “made more lively or cheerful.” None of these words accurately describe the woman’s decision to live a secluded life.
The woman is not choosing to live a secluded life because she is morally good or excellent. She is not choosing to live a secluded life because she is courageous. She is not choosing to live a secluded life because she wants to be more lively or cheerful. She is choosing to live a secluded life because she is disgusted by the bad things that people do.