To Avoid a Mistake When Using an Update Query That

Multiple Choice

To avoid a mistake when using an update query that includes making calculations on a field,what is one thing you can do to prevent losing the original information?

A) Add an additional field with the original figures.
B) When you run the query,just undo if you question the new figures.
C) Rerun the query to make sure the figures have updated.
D) Backup the database after you have run the query.