Block X Block Y "" m Figure 1. Before the collision BIOCKX BlockY MEI V'" Figure 2. After the collision Block K slides along a horizontal surface T.yith a speed ux toward block Y that is initially at rest, as shown in Figure 1. After block 3 collides Tarith block '1': the two hloclts remain stuck together and travel at a Trelocity Ufa-5:1,: as shown in Figure 2. Frictional forces are considered to be negligible. Which of the following claims is correct regarding the momentum of the system containing only block X and the system that contains block X and hloclt Y? (A) The system containing hloclr X is an open system, and the system of both blocks is an open system (B) The system containing block x is an open system, and the system ofhoth blocks is a closed system. (C) The system containing hloclr X is a closed system= and the system ofho'th blocks is an open system. {D} The system containing bloc}: X. is a closed system= and the system of both blocks is a closed system