You Are Measuring the Trait of Friendliness in a Set

Multiple Choice

You are measuring the trait of friendliness in a set of 100 monozygotic twins. You notice that for almost all of the twins, when one is high on this measure, the other twin is also high. We would say that the trait of friendliness has

A) high concordance
B) low reaction range
C) high selection pressure
D) low heritability
E) high genetic flow