The quote means that Hitler was thorough and consistent when it came to his promises (aka his harsh dictations) towards the Jewish. This means that the narrator found that when Hitler said something, he was reliable in his word, even if it affected the Jewish peoples negatively.
Very small... E.g microphone, microwave, microscopic
I just read this not long ago, i always thought that the turning point in which macbeth truly changes from his original depiction is when he grows jealous and paranoid of banquo and his decendants. i would say b is the right answer.