How does this assessment help an ACE certified Personal Trainer address a client's issue with gait and balance?

How does this assessment help an ACE certified Personal Trainer address a client’s issue with gait and balance?

How does this assessment help an ACE certified Personal Trainer address a client’s issue with gait and balance?
A . The trainer can assess bilateral mobility of the thoracic spine.
B . The trainer can assess symmetrical lower-extremity mobility and stability.
C . The trainer can examine stabilization of the scapulothoracic joint and core control while the client is on one leg.
D . The trainer can examine the ability of the hip and torso to remain stable while the client is on one leg.

Answer: D