The projectile motion has both vertical and horizontal components acting simultaneously.
The direction is already specified for the horizontal motion in a projectile so direction is irrelevant. The horizontal motion of a projectile depends upon the velocity (this is constant along the x axis) and time.
Hence, the option (a), (b) and (d) are wrong.
The range or maximum horizontal distance travelled by an object in a projectile motion depends on velocity and time.
Therefore, the option is .