How to deal with the upgrade mark displayed on the quotation that was created locally for a long time but not formally submitted for review?

How to deal with the upgrade mark displayed on the quotation that was created locally for a long time but not formally submitted for review?
A . Click Upgrade and submit after the upgrade is complete
B . Click the upgrade icon and check the differences after upgrading to confirm they are correct before submitting
C . Cannot submit directly, need to create a new quotation
D . If no blocking warning message is displayed, just submit it directly

Answer: B