Adam had promised Bob that, if at any time Adam decided to sell his summer cottage property known as Blackacre, he would give Bob the opportunity to purchase Blackacre. At a time when Bob was serving overseas with the United States Navy, Adam decided to sell Blackacre and spoke to Barbara, Bob's mother. Before Bob sailed, he had arranged for Barbara to become a joint owner of his various bank accounts so that Barbara would be able to pay his bills when he was gone. When she heard from Adam, Barbara took the necessary funds from Bob's account and paid Adam $20,000, the fair market value of Blackacre. Adam executed and delivered to Barbara a deed in the proper form purporting to convey Blackacre to Bob. Barbara promptly and properly recorded the deed. Shortly thereafter, Barbara learned that Bob had been killed in an accident at sea one week before the delivery of the deed. Bob's Last Will, which has now been duly probated, leaves his entire estate to First Church. Barbara is the sole heir-at-law of Bob. There is no statute dealing with conveyances to dead persons. Title to Blackacre is now in (A) First Church. (B) Barbara. (C) Adam free and clear. (D) Adam, subject to a lien to secure $20,000 to Bob's estate