C.
D.
E.
These should be the main reasons. As Pluto was mainly categorized in dwarf planet for not being able to satisfy the last statement which states that it should have a fixed neighbourhood with other planets.
Silver is Ag from the latin Argentum
Lead is Pb from the latin Plumbum
What is the question if it is true write true if it is not true fix the quesion so it is true
