Answer:
a. Freeze the panes
Step-by-step explanation:
Spreadsheet programs like Excel have the command freeze panes that allows to visualize different parts of the worksheet at the same time by freezing rows or columns which helps you to view the cells chosen permanently when moving around the content. For example, you can freeze the top row that contains the names of the columns. According to this, the answer is that Sara can freeze the panes to keep the column headings visible even while she is working in a distant portion of the worksheet.