In Vlocity Cart, what does the Submit Order button do?

In Vlocity Cart, what does the Submit Order button do?

Note: This question displayed answer options in random order when taking this Test.
A . Invokes the CPQ API to create assets, sets the order status to Activated, and navigate theuser to the account
B . invokes an OmniScript which calls the CPQ API to create assets, set the order status to Activated, and navigate the user to the account
C . Invokes a Flow to create assets, set the order status to Activated, and navigate the user to the account
D . Invokes an OmniScript to complete the order process and collect billing information

Answer: B