Answer: A
Explanation:
Clauses are independent:
<em>Dickens</em>
<em>but he had </em>
<em>for many </em>
<em>so he had</em>
Almost all of them have a coordinating conjunction. We can consider an excess.
There is no slang; it has a lot of independent clauses. There are not subordinate clauses.
It suggests the dog is guilty of something
if he were excited or delighted, he would be wagging his tail
