What does 2 Samuel 24:13 mean?

So Gad went to David and said, 'Here are your options: three years of famine in the land, three months of running from your enemies, or three days of a deadly plague. Think it over and decide what answer I should take back to God.' 2 Samuel 24:13 - Modern Text Bible

(David is offered three forms of judgment, each severe in its own way. The choice is meant to make him consider the impact on his people.)