Final answer:
Object A and Object B are most likely identical in shape, but different in size.
Step-by-step explanation:
The resulting objects A and B are most likely identical in shape. When object A is sliced in half along the x-axis to create object B, the two resulting halves will have the same dimensions and shape. The only difference between object A and object B will be their size, with object B being half the size of object A.