The correct answer is<em> D), encouraging business growth by putting more money into circulation</em>.
The decision of the Federal Reserve to lower the interest rate is because they are looking to increase the growth of the economy, and at the same time, to lower the unemployment rate. When the Federal Reserve lowers the interest rate, they are using an expansionary measure because they want to stimulate the economy.
I think the answer might be twelve cause if there are four green picks and he gets 2 orange picks every green pick then you add. You do 1+2 4 times. 3,6,9,12