Source A + B are written sources after prohibition and was about why and when prohibition was brought in. They do not say prohibition was bound to fail. Source A comments on the consequence of the 18th Amendment and the increase of crime, which suggests that this was due to prohibition. It says it is bound to fail in the 2nd paragraph as ‘law had gone against the daily customs, habits and desire of so many Americans’. Source B has one of Capone’s comments ‘all I do is supply a public demand’. This means that he is giving the public what they want which was alcohol and it was not his fault. This shows public demand was so strong and suggests that prohibition caused a big problem with public demands and therefore showing that prohibition was failing.
Source C + D are before prohibition trying to build support for the 18th Amendment. These where probably produced by pressure groups that were for prohibition but it was too early to tell if prohibition was bound to fail. They were against alcohol because their husband would become distressed over drinking too much alcohol and make their families poor. The posters were very popular especially women as it affected them more. Also the men where away fighting at war.