Final answer:
Under the Review tab in Microsoft Word, users can find tools like Spelling & Grammar check, thesaurus, and features to add comments, making option c) Spelling, Grammar, Thesaurus the correct answer.
Step-by-step explanation:
The groups that a user can find under the Review tab in Microsoft Word are related to document proofing and collaboration features. These groups include functionalities such as Spelling & Grammar check, thesaurus, and the ability to add and manage comments.
To be specific, the correct answer from the provided options is c) Spelling, Grammar, Thesaurus. Additionally, users can utilize the Review tab to track changes, compare documents, and enter reading mode, amongst other features.