The answer would be D because it leaves you thinking about what will happen next. Hope this helped you out .
If we subtract the atomic number from the weight, we get the number of neutrons in the particle. This is because protons and neutrons each have a weight of 1, while electrons are 0. And since the atomic number is also the number of protons in the atom, subtracting it from total weight gives us the number iif neutrons.
It tells you that they descended from a common ancestor.
