Read the following passage and answer question.

In a cultivated voice marked by a slight accent that gave it added precision and deliberateness, he said, “It is a very great pleasure and honor to welcome Mr. Sanger Rainsford, the celebrated hunter, to my home.”

The word cultivated has several different meanings. Which one is being used in the passage?

to break up soil with a tool
to plant crops
to be civilized and cultured
to nurture