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.
Answer: The setting of “The Colomber” is the sea. The sea is a spooky setting because it has so many unexplored regions, too deep for most man-made machines to explore. It is also spooky that the colomber wanders the ocean because the oceans are all interconnected. Stefano will always be on some continent surrounded by ocean. Although he may be far away from the edge of shore, he’s always surrounded. This enforces the theme in the story that one cannot escape one’s fears. No matter where Stefano is, the lure and the presence of the ocean (which is home to the creature he most fears) is always waiting for him.
Answer:
Marble forms when sedimentary limestone is heated and squeezed by natural rock-forming processes so that the grains recrystallize. If you look closely at a limestone, you can usually see fossil fragments (for example, bits of shell) held together by a calcite matrix.
The answer is D. Infancy and old age.
I hope this helps. :)