Which sentence from later in the text best helps develop the idea expressed in paragraph 2?

Question

Their long, slow existence “has ben key to their survival — from a time of overexploitation to a time of greater enlightenment and conservation,” she wrote in an email
By targeting more than 3,000 genes of interest, the researches could tease out the variations between humans and tortoises
Lonesome George was a conservation icon, Caccone said, but a conservation icon that can also provide insights into human health and aging
Thanks to this analysis, the researchers were able to narrow down their original list of 3,000 genes to 43 specific sequences that might have contributed to Lonesome George’s long, diseased free life.

Answer 1

The sentence that best helps develop the idea expressed in paragraph 2 is:

"Thanks to this analysis, the researchers were able to narrow down their original list of 3,000 genes to 43 specific sequences that might have contributed to Lonesome George’s long, diseased free life."

This sentence provides a concrete example of how the research focuses on genetic factors that contribute to the long lifespan and health of tortoises, which aligns with the ideas of conservation and understanding longevity expressed in the earlier paragraph.