Suppose a Loaf of Bread Sold for $3

Suppose a loaf of bread sold for $3.00 in 2016. The price of bread then increases to $3.60 in 2017. The price index for bread in 2017, considering 2016 as the base year, is _____.

A) 1.20
B) 83.33
C) 120
D) 100
E) 20