According to the article, which of the following parties contributed most to the release of the Guildford Four

A．convictions can be made on confessions and statements taken by police officers from accused persons are valid legal evidence
B．convictions can' t be made on confessions alone and there should be a third party when taking statements from accused persons
C．convictions can be made on confessions and a third party should be present when taking statements from accused persons
D．convictions can' t be made on confession alone and the statements taken by police officers from accused persons are valid legal evidence

A．the proceedings seemed inappropriate to the occasion
B．he was afraid that the contestants would become violent
C．he felt that no progress was likely to be made
D．he was not accustomed to such stupidity.