When a person observes an object is partially overlapping another object then the object which is behind appears to be farther away. This phenomenon is called interposition.
Here, as Pedro thought his son was closer to him as his son overlapped his daughter. Hence, the distance cue which influenced the father's perception is interposition.
They haven't impeached him yet, it has another level to pass through.
They want to impeach him because they want Nancy in office, which will not be pretty, and the reason his impeachment trial hasn't gone all the way yet is because they are trying to edit the rules.
The answer is C. Because if you let them pick their group it will be their opinion so it will be biased.And the other two wouldnt help at all.Therefore C is the answer Good luck :)