The Following Time-Series Data Shows the Average Number of Vacation $$\begin{array} { l l } 2010 & 22 \\2011 & 25 \\2012 & 26 \\2013 & 29 \\2014 & 24 \\2015 & 21 \\2016 & 22 \\2017 & 20 \\2018 & 19\end{array}$$

Multiple Choice

The following time-series data shows the average number of vacation days taken each year by employees.
$$\begin{array} { l l } 2010 & 22 \\2011 & 25 \\2012 & 26 \\2013 & 29 \\2014 & 24 \\2015 & 21 \\2016 & 22 \\2017 & 20 \\2018 & 19\end{array}$$
Which of the following would be indicated if these data were shown through a visualization of these data?

A) The average increased with each year shown.
B) The average increased and then generally decreased during these years.
C) The average decreased with each year shown.
D) The average was highest in 2012 then declined since then.
E) The average was lowest in 2015 and increased since then.