the answer to your question is d
When you understand the problem completely, you can build the project up from it. defining the problem is like defining a word in some text; when you know it, you know the rest of the content.
Answer:
A. A man of disreputable nature.
Explanation:
Just by looking at the question and answers, you can determine that the most formal statement is A. A man of disreputable nature. By the use of the word formal, people tend to think of respectful/professional words/things. The words shady character and snake in the grass are more of a casual/informal way of describing a "suspicious" person.