Which two solutions should a consultant recommend to meet this requirement?

Universal Containers has set up a sales process that requires opportunities to have associated product line items before moving to the negotiation stage.

Which two solutions should a consultant recommend to meet this requirement? Choose two answers.
A . Configure a validation rule that tests the Has Line Item and Stage fields for the correct condition.
B . Configure the opportunity record types to enforce product line item entry before selecting the negotiation stage.
C . Ensure that all sales representatives have access to at least one PriceBook when creating product lines.
D . Define a workflow rule that automatically defaults to a PriceBook and product line item when selecting the negotiation stage.

Answer: A,C