Which answer illustrates "compound interest"

a- you open two savings account and put money in both
b- compound interest only occurs on the first 10% you have earned
c- you can interest only on the original amount you deposited in your account
d- you earn interest on the money in your savings account. then you, in addition earn interest on interest

answer; /// the best answer to the above question is; the main economic goal that a society consider when deciding the best way to distribute its wealth is equity, this to ensure that all resources are equally distributed; ///(a) (economic equity)

it's actually a very difficult task, due to not many people can make 2 million dollars in 2 years. besides that, to the not-so-realistic ideas, you can create a business. it could be practically anything, but make it into a business that isn't that known yet, you get me? also, lets not forget about stock market. that's where all the good stuff happens. use investments at the beginning and begin to raise up your business or whatever you're going to do. as this is a very non-realistic idea, it's still worth the shot!