Two friends start running in opposite directions from the same point. One friend runs 2km/h faster than the other. After 1 hour, they are 10 km apart. What is the speed of both ?

A ) 4km/h, 6km/h ✅

B ) 2km/h, 4km/h

C ) 1km/h, 3km/h

D ) 5km/h, 7km/h