A projectile will be launched from a 2.00-m tall platform and must hit a target at a horizontal distance of 25.0 m away on an identical 2.00-m tall platform. What is the slowest speed at which the projectile can be launched?
A) 10.2 m/s B) 12.5 m/s C) 15.8 m/s D) 17.7 m/s E) 21.0 m/s