B). He is prone to displaying unpredictable behavior.
Explanation:
As per the given excerpt, it could be inferred that the judge's opinion of Huck's father is that 'he is prone to displaying unpredictable behavior'(option B) which is reflected by the use of phrases like 'drunk as fiddler', 'crawled out again', 'he didn't know the other way', etc. The judge's description reveals his uncertainty about Huck's father after assessing the fluctuations in his behavior which is mirrored by his actions like 'rolled off the porch', 'broke his left arm' which made him(judge) experience a 'sore'. Thus, <u>option B</u> exemplifies the correct opinion of The judge about Huck's abusive and intoxicated father.
