To add and remove chart elements, you can use the add chart element button in the charts layout group on the tab.

This question has multiple choices;
 
a. CHART TOOLS LAYOUT
b. CHART TOOLS DESIGN
c.  INSERT
d.  HOME

The answer is A) CHART TOOLS LAYOUT

Once you have created a chart, you can always adjust its look. Instead of changing or adding the chart elements manually, you can apply a predefined layout to your chart. To do so, you will click anywhere in the chart or the chart element and this will display the charts tool. You will then be able to use the chart layout that you want to use on the Design tab, in the Charts layouts group menu.     

Answer (a) primarily in your lane before entering the shoulder;

By default, powerpoint opens in normal view, displaying the thumbnails, notes and slide view. if you prefer, however, you can specify that powerpoint open in a different view, such as slide sorter view, slide show view, notes page view, and variations on normal view.