Explanation/Reference:
Explanation:
According to the question, you want the sheet tabs of the sheets containing charts to appear in red color.
In order to accomplish the task, you must take the following steps:
1. Select the sheets containing charts.

C:\Documents and Settings\Administrator\Desktop\1.JPG
2. Right-click on the sheet tabs. Choose the Tab Color option from the shortcut menu.

C:\Documents and Settings\Administrator\Desktop\1.JPG
Incorrect Answers:
Answer options A and D: These steps will not affect the appearance of the sheet tabs.
C: This is an invalid answer option.
References: https://www.thoughtco.com/change-worksheet-tab-colors-in-excel-4020732