if the base year is 2007, then the consumer price index was . a. 80 in 2006, 100 in 2007, and 105 in 2008. b. 80 in 2006, 200 in 2007, and 210 in 2008. c. 160 in 2006, 100 in 2007, and 105 in 2008. d. 160 in 2006, 200 in 2007, and 210 in 2008.