In 1930, scientists discovered Pluto and labeled it as the ninth and smallest planet in our solar system. Later, other planet-like objects that were larger than Pluto were discovered. This caused scientists to redefine the term "planet" in 2006, and Pluto was relabeled as a dwarf planet.


So, the discoveries that followed the finding of Pluto led to the...

Achanging of Pluto's composition.

Bchanging of Pluto's classification.

Cchanging of Pluto's original location.