A. Antecedent would be the best answer. A thing or event that existed before or logically precedes another. Antecedent Example: The athlete extended a hand to his opponent. Pronoun: His Antecedent: Athlete
So, the basic point is that more money gives you happiness. You can just say that the more money you have the happier you'll be. A thesis statement doesn't have to be complex; it just has to clearly define what your main idea is for your writing.
