A 2kg block is at rest on a frictionless table. One student pulls it eastward with 8N while another pulls it westward with 5N at the same time. What happens to the block?
a) It moves towards the east with constant speed because the stronger force decides the direction.
b) It accelerates towards the east because the forces are unbalanced.
c) It accelerates towards the west because the forces are unbalanced.
d) It remains at rest because the forces are balanced.