The correct answer is option 'D' - None of the above.

Explanation:
When a range is selected in a spreadsheet program such as Microsoft Excel or Google Sheets, there is no specific keyboard shortcut to activate the previous cell. However, there are other ways to navigate to the previous cell or to move the active cell after selecting a range.

Here are a few possible ways to activate the previous cell after selecting a range:

1. Arrow keys: After selecting a range, you can use the arrow keys on your keyboard to navigate to a specific cell within the selected range or to move the active cell to a neighboring cell.

2. Mouse click: You can also activate a specific cell within the selected range by clicking on it with your mouse. This will make the clicked cell the active cell.

3. Go To feature: In Excel, you can use the "Go To" feature to navigate to a specific cell or range of cells. Press the Ctrl+G shortcut to open the "Go To" dialog box. Enter the cell reference or range you want to navigate to and click on the "OK" button.

It's important to note that the answer options provided in the question (a) Press the Alt key, b) Press Tab, c) Press Enter) are not the correct ways to activate the previous cell after selecting a range.

In summary, there is no specific keyboard shortcut or method to activate the previous cell after selecting a range. Instead, you can use the arrow keys, mouse click, or the "Go To" feature to navigate to a specific cell within the selected range or to move the active cell.