Which of the Following Best Describes the Physical Ability Known

Which of the following best describes the physical ability known as trunk strength?

A) the ability to maintain equilibrium despite forces pulling off balance
B) the ability to coordinate the simultaneous actions of different parts of the body
C) the ability to expend a maximum of energy in one or a series of explosive acts
D) the ability to exert muscular strength using the abdominal muscles
E) the ability to move the trunk and back muscles as far as possible