Which of the following elements can you add to a chart to display a line representing the general direction in a data series?

A) Axes
B) Legend
C) Gridlines
D) Trendline

Trendline can be added to a chart to display a line representing the general direction in a data series. Axes are the scales on the chart that help to measure and display the data. Legend is a key that helps to identify the different data series represented in the chart. Gridlines are horizontal and vertical lines that help to visually connect the data in the chart.