An Analyst Gathered the Following Year-End Price Level Data for an Economy

An analyst gathered the following year-end price level data for an economy. What is the economy's annual inflation rate for 2019?
$\begin{array}{lrr} \text { 2017 } &159.0\\ \text {2018 } &165.0\\\text {2019 } &169.0\end{array}$

A) 2.27%
B) 2.42%
C) 2.49%
D) 2.78%
E) 3.77%