As per the question, the given sentence is in error as it carries a 'comma splice' which implies the linking of two independent clauses with a comma incorrectly and unnecessarily. 'Comma splice' is usually employed to offer an informal tone to the sentence. The sentence comprises two independent clauses 'Many car enthusiasts travel the world in search of the classic car' and ' I love old cars but can't afford to support such a hobby' that can stand independently but joined with a comma falsely and does not contain conjunction. Thus, <u>option A</u> is the correct answer.
