Which of the Following Statements About Walking Gait Are True

Which of the following statements about walking gait are true?

A) The hamstring muscles are important for absorbing initial impact force at the knee.
B) Most muscle activity in walking is associated with initiating and ending joint movements.
C) The hamstring muscles are active throughout most of the swing phase.
D) During mid-stance, both hamstring and quadricep muscles are maximally active to support body weight.