What are the two PNF diagonals and an example of when each would be used?
a) D1: Upper extremity flexion, D2: Lower extremity extension
b) D1: Lower extremity flexion, D2: Upper extremity extension
c) D1: Diagonal movement from the shoulder to the opposite hip, used for rolling over in bed
d) D1: Diagonal movement from the hip to the same-side shoulder, used for reaching across the body