Which of the Following Exercises Reflects Functional Strength Training Exercise

Which of the following exercises reflects functional strength training exercise design to target weak hip abductors?

A) Forward step ups to 6 in.stair with light upper extremity support,repetitions to fatigue.
B) Seated bilateral hip abduction weight machine,70% 1RM,12 repetitions ×2 sets.
C) Lateral step down from 6 in.stair with light upper extremity support,repetitions to fatigue.
D) Sidelying lateral leg lifts with cuff weights,60-75% 1RM,10 repetitions ×2 sets.