Which of the following was most likely used to apply red background and font to some of the cells in column D?

d. conditional formatting

Explanation:

The option that would most likely be used to accomplish this would be conditional formatting. This is an option in which, if a condition is met, the cell is given certain format changes. In this scenario, the condition would be if a cell is located in column D, then apply a red background and specific font. This would be automatic throughout the entire document so that if any new cell is created in column D it would automatically be formatted according to the conditional formatting that was used.

answer; i believe the correct answer is (classes);

depends on what software you are using. google docs or microsoft word or other?