The sum of the forces acting on a jet that strikes the plate at a right angle is equal to:

A. $- \rho U^2_{nozzle} A_{nozzle}$
B. $- \rho U^2_{y} A_{nozzle}$
C. $- \rho U^2_{y} A_{plate}$
D. $- \rho U^2_{nozzle} A_{plate}$