You hold your arms outstretched and level in front of you. You rest a meter stick on your hands, with the 0 cm mark on your left hand and the 75 cm mark on your right hand. Slowly and keeping your hands level, you bring your hands together. When your hands touch each other, they will be at the mark for
a) 0 cm
b) 25 cm
c) 37.5 cm
d) 50 cm
e) 75 cm