The answer is B. Fused sentence
Step-by-step explanation:
In writing, a fused sentence or a run-on sentence refers to a grammatical mistake that occurs as writers do not place an appropriate conjunction/ transition or punctuation mark between two or more complete independent sentence. In the case presented, this occurs because there is not a word or punctuation mark such as a semicolon before "my mother drives one that is in perfect condition" which is a different sentence to "The 1957 Chevy Nomad is one of the finest vehicles ever made" and therefore should be separated from this.