Final answer:
The correct command to change all instances of the word 'treatmants' to 'treatments' in a document is Find and Replace. Therefore, the correct option is A) Find and Replace
Step-by-step explanation:
The correct answer is A) Find and Replace. Using the 'Find and Replace' command in a word processing program allows you to search for a specific word or phrase and replace it with another word or phrase throughout the document. In this case, you would search for 'treatmants' and replace it with 'treatments'.