Formal.
As far as I know, there is no such thing as either standard or practiced diction. Informal is the way you communicate with your friends, for instance, which is not how you would write a thesis paper, legal document, etc.
Other words that start with a C
Answer:
B) I limited my conversation to general things, like the weather, so as not to arouse or upset even a person with mental problems.
Explanation:
The correct answer for this question is this one: "a. The reader's perceptions of Griselda's goodness are undermined by her lack of concern for her children's welfare.; d. Characters who behave poorly are nonetheless rewarded by good fortune." Hope this helps answer your question and have a nice day ahead.