How do you know if all of these answers that you ask on here are always true?

Which phrase most closely matches the meaning of the word pleasantries in this excerpt from susan glaspell's trifles? county attorney: (as one turning from serious things to little pleasantries) well ladies, have you decided whether she was going to quilt it or knot it? a. tea cakes b. trivial talk c. foolish actions d. childish behavior