68.) Croce is identified in a line-up by the victim of a gun point robbery. Prior to processing the arrest, the detective assigned to the case questioned Croce in an interview room located at the precinct. After reading Croce his Miranda warnings, the detective tells Croce he has been identified in a lineup and that if he confesses, he will speak to the District Attorney on his behalf. If Croce confesses, which of the following MUST be true: a) The confession is admissible against Croce at trial; b) The confession is inadmissible because the Detective cannot make promises to get a confession; c) The confession is inadmissible as fruit of the poisonous tree; d) The confession is inadmissible because the Detective questioned him prior to processing the arrest