Answer a If you want to know how Dickens’s last novel would end. What common error in sentence construction is evident in this example?

comma splice
run-on sentence
sentence fragment
missing conjunction

C). Sentence Fragment.

Explanation:

A sentence fragment is described as an incomplete sentence; a phrase or clause that is punctuated and capitalized like a sentence but does not constitute a complete grammatical sentence. It is usually caused by the failure to include a subject and a verb, or as the result of beginning a sentence with a subordinate conjunction or relative pronoun.

The given is a 'sentence fragment' error as it conveys a partial meaning. It is incomplete as it begins with a subordinating conjunction('if...know') and without accomplishing a complete meaning it ends abruptly. A dependent clause must always be followed by an independent clause to accomplish its meaning but here, it is immediately followed by a dependent clause beginning with another relative clause('how...end'). Thus, option C is the correct answer.