Lincoln Investments is registered as a broker-dealer and as an investment adviser. When opening an account for a customer, the firm has the customer sign a statement that discloses that transactions recommended by Lincoln Advisers are effected through Lincoln Brokerage, which earns commissions on those trades. Obtaining the signed statement would NOT be required if:A. Lincoln Advisers recommends the purchase of a security and Lincoln Brokerage sells the customer that security out of its inventoryB. Lincoln Advisers recommends the sale of a security and Lincoln Brokerage executes the sale acting as agent in the OTC marketC. the customer effects a trade through Lincoln Brokerage that was not recommended by Lincoln AdvisersD. the customer signs a waiver covering all disclosures that are legally required