Which of the Following Is True of the Personality Differences

Which of the following is true of the personality differences among cell phone users as discovered by research?

A) Those who were less conscientious spent more time texting than those who were more conscientious.
B) Individuals with a weak sense of self-identity spent much more time making calls than individuals who scored higher on that personality characteristic.
C) Those who were shy spent less time texting when compared to those who were extraverted.
D) Introverts spent much more time changing their ring tones and wallpapers than extraverts.