Her Friends Describe Susie as an Extravert

Her friends describe Susie as an extravert. Susie thinks that she has changed in her adult years because she always felt she was an introverted child. According to the trait theory perspective:

A) this is impossible as traits such as extraversion are highly stable over time
B) this is possible as traits such as extraversion vary in stability over time
C) this is possible as extraversion is not considered a personality trait
D) this is impossible as traits such as extraversion vary in stability over time