A patient is referred to physical therapy with chief complaint of low back pain as well as left hip pain. Which of the following examination findings during gait analysis are MOST consistent with weakness of the left gluteus medius?

a) LEFT lateral trunk lean during mid-stance on the LEFT lower extremity
b) RIGHT lateral trunk lean during mid-stance on the RIGHT lower extremity
c) LEFT hip drop during mid-stance on the RIGHT lower extremity
d) RIGHT hip drop during mid-stance on the RIGHT lower extremity