The the ditch could stop others from invading the town
The suffix -ine in the word heroine refers to a female person. A hero is a main protagonist, or a brave man, but if you want to use a word for a woman to denote the same thing, you would add the suffix -ine to mark that this is a female gender. Hope this helps! :)
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:
I think the answer is D or C
C.) The woman who works at the desk
