Which option of the autocorrect tool enables you to add and delete words that do not follow abbreviation rules?

The replace text as you type of the Autocorrect option on the Proofing tab.

Many Microsoft office applications support Autocorrect. Autocorrect has a feature that allows you to add and delete words that do not follow abbreviation rules. For example, a frequently used word like Mark Smith from the University of Illinois can be replaced by a shorthand typed phrase like MSI. To assign or delete an abbreviation, you should click the File tab and then go options. Select proofing and click on the autocorrect options.