Zach would like to reuse a spreadsheet that he created last year. however, he will need to delete the contents of several cells. zach should

use his arrow to move to each of these cells and press delete
highlight the desired cells and use the clear command
start a new spreadsheet from scratch
click on each cell and press space bar

Zach should highlight the desired cells and use the clear command .

Explanation:

Zach use his arrow to move to each of these cells and press Delete : Though this seems to be right, it is an time consuming method if the data is too large to delete contents one by one. This method is not advisable even for smaller amount of data. Highlight the desired cells and use the clear command : This is the right answer. We can select the list of continuous data either using the keyboard or using mouse either click clear command or press delete button from the keyboard. start a new spreadsheet from scratch : This is not the desired option since we want to re-use the existing sheet. click on each cell and press space bar: This is also one of the right option but not advisable since it is time consuming.