Answer:
They had a long talk and a few days later he received a fax with a funny joke.
D. Semicolons are only used when both sides of the semicolon can stand alone as their own sentences about very similar topics.
In training
the first problem when training the dog is that sometimes they won't cooperate and hard to control, second is that they'll rebel and bite.
While with the owner
First, sometimes the dog will get distracted. Second, the dog might get out of it's collar and get loose.
I hope I helped
I think A. it conveys that Wind-wolf was taught things non traditionally but that doesn't make him unlearned