MS Excel
To select an entire column in MS - EXCEL, press ?

CTRL + Arrow key
CTRL + C
None of the listed here
CTRL + S

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MS Excel
When all the numbers between 0 and 100 in a range should be displayed in Red Color, apply

Select the cells that contain number between 0 and 100 then click Red color on Text Color tool
All of above
Use =if() function to format the required numbers red
Apply Conditional Formatting command on Format menu

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MS Excel
You can select a single range of cells by

Dragging over the desired cells
Clicking the upper-left cell in a group of cells and then pressing the Shift key while clicking the lower right cell in a group of cells
Pressing the Ctrl key while dragging over the desired cells
Pressing the Shift key and an arrow key

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