Chambersburg Corp -Refer to the Information for Chambersburg Corp

Chambersburg Corp.
The following information is for Chambersburg Corp.for 2018 and 2017.Chambersburg uses the straight-line depreciation method.
$$\begin{array} { l r r } & \underline { \mathbf { 2 0 1 8 } } & \underline { \mathbf { 2 0 1 7 } } \\\text { Property, plant, and equipment } & \$ 250,000 & \$ 190,000 \\\text { Accumulated depreciation } & 100,000 & 85,000 \\ \text { Depreciation expense } & 62,500 & 47,500 \\\text { Net sales } & 1,000,000 & 900,000 \\\text { Average total assets }& 625,000 & 475,000\end{array}$$
-Refer to the information for Chambersburg Corp. ?
Using the 2018 data,what is the average age of Chambersburg's property,plant,and equipment?

A) 1.60 years
B) 2.50 years
C) 4.00 years
D) 10.00 years