I would say that the answer is C. are visiting
Answer:
form or set of forms of a verb in which the subject undergoes the action of the verb (e.g. they were killed as opposed to the active form he killed them ).
The effect of the narrative description of Huck's father is of a man who is not looked after, who is poverty stricken and unkempt and with low self esteem and for example re his hair that was greasy and hung down ie was dirty and not combed shows this. Also, from the sounds of it he was lily white, what we might call someone 'white trash' white these days.