A. Outset - This refers to the beginning or start of something. In the context of the sentence, "from the outset" implies that the man declared his intention right from the beginning. B. Inset - An inset typically refers to a smaller section of a larger whole, often used in maps or diagrams. It doesn't fit the context of declaring intention. C. Onset - This usually refers to the beginning or start of something, similar to "outset." However, "from the onset" isn't as commonly used as "from the outset" in this context. D. Offset - This means to counterbalance or compensate for something. It doesn't fit the context of declaring intention. Given the context of declaring intention, "from the outset" is the most appropriate option as it directly implies that the declaration was made from the very beginning or start.