When Brett Was Born, He and His Identical Twin Were

Multiple Choice

When Brett was born, he and his identical twin were separated and have been living on opposite sides of the country ever since in houses of equal socioeconomic status yet with parents employing drastically different parenting styles. Which of the following are Brett and his twin MOST likely to share?

A) a sense of rebelliousness
B) level of anxiety
C) IQ score
D) music preference