what is the effect of the chancellor of the exchequer entrance at the inn just after fisher says, "by jove! that's an idea. you're perfectly right. and that suggests a very queer idea, doesn't it? "

a.)it builds suspense as readers are eager to know what idea it suggests.
b.)it shocks readers by revealing a detail about fisher that he wants to hide.
c.)it introduces a flashback that explains exactly what killed the man.
d.)it adds a parallel plot line that casts doubt on fisher's honesty and innocence.