How many years in prison did roland gary service for killing a religious leader?

20 years.

Explanation:

Roland Gary killed a religious leader Robert Hardcastle nearly twenty years ago, stabbed him to death, he was found guilty of his crimes and then sentenced to death row, a fate which finally reached him 20 years later in a prison in Oklahoma. He always claimed that the stabbing of Mr. Hardcastle was done in self-defense, but neither the court or the appellation trials believed him enough to save him from the death penalty, he served 20 years in prison before being executed with lethal injection.

i don't get what you mean

explanation:

#2 the answer is d

#3 the answer is a

#4 the answer is b