In a Study in Britain by Hodson Et Al

In a study in Britain by Hodson et al. (2005) , white participants were presented with a case study of a robbery, When the evidence was clear, participants judged the defendant as guilty, whether black or white. When did race make a difference in this study?

A) when some evidence was ruled inadmissible by the judge
B) when the race of the defendant was not described
C) when the participants felt anxious about a black defendant
D) when the robbery was for a large amount of money
E) when the robbery was for a small amount of money