Final answer:
To determine which statement about points and planes is accurate, the actual positions of points C, D, E, F and their relationship with planes X and Y are necessary. The presence of a diagram or additional information would be essential.
Step-by-step explanation:
The question involves understanding the relationship between points and planes in geometry. Without an accompanying diagram, we cannot definitively conclude which statement is true as the relative positions of the points C, D, E, F, and the planes X, Y are unknown. However, if we had the diagram and based on typical configurations, we could determine if points C and D lie on the same plane, if points D and E are co-planar, which points lie in plane X and which lie in plane Y.
Since we don't have specific information about the positioning, we can only provide a general explanation: A line can be considered contained in a plane if both points defining the line lie within that plane. If both points C and D lie on plane Y, then the line passing through them would also be contained in plane Y. Similarly, this logic applies to points D and E with respect to plane Y. Regarding the exclusivity of points in a plane, it's unusual to state that only certain points lie on a given plane unless it is specifically shown or stated in the problem as planes extend infinitely in two dimensions.