Study the following table carefully and answer the questions based on it.

The following table shows the domestic sales of vehicles of four manufacturers from 2010 to 2015 .

Manufacturer	2010	2011	2012	2013	2014	2015
A	560000	580000	600000	620000	650000	680000
B	540000	590000	570000	630000	710000	550000
C	610000	580000	620000	680000	690000	630000
D	630000	570000	700000	690000	700000	640000

With respect to which of the following combinations, is the sales of vehicles lowest over the given period?