18 A spring-loaded gun can fire a projectile to a height h if it is fired straight up. If the same gun is pointed at an angle of 45∘ from the vertical, what maximum height can now be reached by the projectile?
(A) h/4
(B) 22h
(C) h/2
(D) 2h
(E) h
(A) h / 4
(B) 22h
(C) h / 2
(D) 2h
(E) h