Final answer:
b) The correct actions to perform for the given tasks in a data table of a chart are explained.
Step-by-step explanation:
The correct answer is option B) Enter a new title for the series of data titled "Period 2": _______. To enter a new title for a series of data in a chart's data table, you would typically double-click on the title or select the title and then click on it again to activate the editing mode. This would allow you to directly edit the title and enter a new one.
As for the other tasks:
a) To delete the unneeded series of default data titled "Period 2", you would right-click on the series and select the delete option from the context menu.
c) To start entering horizontal (or x-axis) labels for the series of data titled "Period 1", you would typically click on the corresponding cell in the data table and begin typing the labels.
d) To start entering actual measurement data for the series of data titled "Period 1", you would click on the corresponding cell in the data table and enter the measurement data.
The correct answer involves right-clicking to delete 'Period 2' from the data table or legend, entering a new title for 'Period 2' by editing in the data table or legend, entering x-axis labels below or next to 'Period 1' in the data table, and inputting actual measurement data for 'Period 1' in the column/row for that data series.