Read this text from paragraph 2.

He had some ingenious men among his friends, who amus'd themselves by writing little pieces for this paper, which gain'd it credit and made it more in demand, and these gentlemen often visited us.

How does the word ingenious contribute to this passage?

It makes the tone more professional.
It illustrates the inner motivations of a character.
It develops characters within the passage.
It clarifies a complex idea.