Alex and Brenda owned in fee simple Greenacre as tenants in common, each owning an undivided one-half interest. Alex and Brenda joined in mortgaging Greenacre to Marge by a properly recorded mortgage that contained a general warranty clause. Alex became disenchanted with land-owning and notified Brenda that he would no longer contribute to the payment of installments due Marge. After the mortgage was in default and Marge made demand for payment of the entire amount of principal and interest due, Brenda tendered to Marge, and Marge deposited, a check for one-half of the amount due Marge. Brenda then demanded a release of Brenda's undivided one-half interest. Marge refused to release any interest in Greenacre. Brenda promptly brought an action against Marge to quiet title to an undivided one-half interest in Greenacre. In such action, Brenda should 
lose, because Marge's title had been warranted by an express provision of the mortgage.  lose, because there was no redemption from the mortgage.  win, because Brenda is entitled to marshalling.  win, because the cotenancy of the mortgagors was in common and not joint.