Answer:
To be extremely busy
Explanation:
The meaning of the phrase "I run before my horse to market" means to be extremely busy. The correct option among all the options that are given in the question is the first option. This also means running ahead of oneself. It depends on the type or place of usage. I hope the answer comes to your help.
Since nothing is underlined, I am going to make an educated guess that the underlines clause is "who had worked with the business person". If that is the case, the correct answer would be D - adjective clause. It is a relative clause, to be more precise, because it starts with a relative pronoun "who", but that is a part of adjectival clauses, so that is the correct answer.
What's the passage and answer choices?