A command that lets you change one or more fields in a record is A. Insert B. Modify C. Look-up D. All of the above E. None of the above

The correct answer is B. Modify.

A command that lets you change one or more fields in a record is a modify command. This command allows you to update existing data in a record, or add new data to a record.

An insert command is used to add new records to a database.

A lookup command is used to find records that match certain criteria.

Therefore, the correct answer is B. Modify.