Need a quick answer Business statistics

What is the correct interpretation of the index number shown below? A B C D E F 1 column count 14 2 column average 5.5 6.9 1.25 W 4 average of relatives index number old price new price column C/column D Commodity New price/old price Chicken $8.00 $9.60 1.20 Bread $2.00 $2.40 1.20 Milk $2.00 $2.60 1.30 10 mean $10.00 $13.00 1.30 Select one: a. Prices have increased by 125% O b. Prices have decreased by 75%. O c. Prices have increased by 25% O d. None of the above