What impact did rising sea levels have on South Florida by 2050

Overall, sea-level rise is making the odds of a South Florida flood reaching more than 4 feet above high tide, by 2050, on par with the odds of losing at Russian roulette. More than half the population of more than 100 Florida towns and cities live on land below that 4-foot line.

because the center-south is called the heart of the country

the answer is the last option or letter d)