If GDP for a certain economy is $1,200 billion at the end of year 1 and $1,300 billion at the end of year 2, the economy's growth rate between the two years is: Please choose the correct answer from the following choices, and then select the submit answer button.a. 8.33 percent. b. 7.69 percent. c. 0.08 percent. d. 8.00 percent.