The number of turtles in a pond is four more than twice the number of crocodiles. Which statement makes this comparison using the correct variable expression? If there are c crocodiles, then there are 4c + 2 turtles. If there are c crocodiles, then there are c + 2 + 4 turtles. If there are c crocodiles, then there are 2c + 4 turtles. If there are c crocodiles, then there are c2+4 turtles.