Correct option is B
Mail Merge is a feature that allows users to create multiple personalized documents, such as letters, labels, and envelopes, by merging a document template with a dataset containing names, addresses, or other details. It is commonly used for mass mailings, invitations, or form letters.
Find and Replace: Searches and replaces text in a document.
Cross-Reference: Links different sections of a document.
Macros: Automates repetitive tasks.