The given Bar Graph presents the Imports and Exports of an item (in tonnes) manufactured by a company for the five financial years, 2013-2014 to 2017-2018.

In which financial year the percentage increase in Imports and Exports taken together is the highest in comparison to its previous financial year?

A

2016-2017

B

2017-2018

C

2015-2016

D

2014-2015