Option (a) is correct. One of the benefits of having a civil trial before a criminal trial is that the defendant may make admissions during the civil trial that can be used in the criminal trial. This is because the burden of proof in a civil trial is lower than in a criminal trial, and evidence obtained during a civil trial can be used in a subsequent criminal trial. However, this benefit must be weighed against the potential risks of having a civil trial before a criminal trial, such as the possibility of self-incrimination and the risk of prejudicing the criminal trial. Options (b), (c), and (d) are not benefits that arise from having a civil trial before a criminal trial.