Emma, Age 8, Can Turn Cartwheels, Do the Splits, and Do

Multiple Choice

Emma, age 8, can turn cartwheels, do the splits, and do handsprings. This is probably due to which two factors of growth in middle childhood?

A) ligaments not firmly attached to bones and increasing muscle strength
B) hardening and lengthening of the bones and tightening of ligaments
C) muscles that are loosely attached to bones and undeveloped muscle tone
D) underdeveloped hip joints and muscles that do not fully develop until adolescence