Ten Pairs of Monozygotic Twins Were Tested for Their Ability

Multiple Choice

Ten pairs of monozygotic twins were tested for their ability to solve geometry problems.The highest score obtained was 46 points,while the lowest was 6 points.The variance in geometry test score within the twenty subjects (measured in points²) was 208.The covariance for test score between twins was 125.In this study,the broad-sense heritability of geometry problem-solving ability is:

A) 26%.
B) 32%.
C) 40%.
D) 60%.
E) It is impossible to calculate.