After using your Web browser to test a few purchases on your staging server, you find that the shopping cart has carried forward purchases from several earlier transactions. What steps should you take first to solve this problem?

A.
Delete the system DSN and re-create it, and then use the shopping cart again.

B.
Close and reopen the browser, and then use the shopping cart again.

C.
Test your e-commerce software on the production server, and then use the shopping cart again.

D.
Delete the database and reinstall it using the same parameters, and then use the shopping cart again.