The answer is B. Spine stretch
Spine stretch is an exercise to stretch your back bone, which mean your upper body, not the lower one.
NB :
Hip Flexor : To stretch your thigh
Calf stretch & Harmstring stretch : To stretch your lower legs
A separation is where the couple is still married but aren't together. They could do to couples therapy or surround yourself with people who are in positive realtionships to try to fix it.
