(a) Option

(a) provides a solid example to support the main idea about finetuning the clemency jurisprudence.

(b) It is an extension of the topic, but it deviate from the topic of mercy petitions or clemency jurisprudence.

(c) Goes against the tone of the paragraph which is positive, ‘thoughtful exposition’ has been used.

(d) It provides secondary information but fails to logically complement the last sentence.