The number of chips of different colors in fran's bag is shown below:

9 red chips
4 green chips
15 yellow chips

fran takes out a chip from the bag randomly without looking. he replaces the chip and then takes out another chip from the bag. what is the probability that fran takes out a green chip in both draws?
a: 4 over 28 multiplied by 4 over 28 equal to 16 over 784
b: 4 over 28 plus 4 over 28 equal to 8 over 56
c: 4 over 28 multiplied by 3 over 27 equal to 12 over 756
d: 4 over 28 plus 3 over 27 equal to 192 over 756