The procedure to use when seeking to use the most powerful optical lenses is b) Decrease the focal length.
The death penalty is presented in "Just Mercy" as a flawed and unjust system.
What is this procedure and penalty for death?
When using a magnifying glass or other optical lens, the focal length is the distance between the lens and the object when the image is in focus. A shorter focal length means that the lens can magnify the object more, so decreasing the focal length will allow you to see the object more clearly.
The book tells the story of Bryan Stevenson, a lawyer who has dedicated his career to defending people who have been wrongly convicted or sentenced to death. Stevenson argues that the death penalty is applied unfairly, often targeting people of color and the poor. He also argues that the death penalty is a cruel and unusual punishment that does not deter crime.