I would modified the option "a" to mention the other dwarf planets. I don't get why everybody feels sorry for Pluto but doesn´t worry about the other objects that are also considered as "dwarf planets".
Other thing that I dislike is the name "dwarf planets". Couldn't just be "Planets class A" and "Planets class B" or similar? Why dwarf? Doesn't it sound a bit rude?
Cheers, Luis.
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