A block of mass 1 kg moving with a speed of \[\text{2 m}{{\text{s}}^{\text{-1}}}\]collides with and sticks to another block of mass 2 kg which was initially at rest. After the collision

• A.  The momentum of the system is less than \[\text{2}\,\text{kg}\,\text{m}{{\text{s}}^{-\text{1}}}\]9
• B.  The kinetic energy of the system is\[\frac{2}{3}J\]  
• C.  The kinetic energy of the system is \[2J\]
• D.  None of these