Which sentence from the text describes the cause of the Pluto controversy?? a. “Pluto, at one time classified as our solar system's smallest planet, continues to
capture the attention of people and scientists all over the world." Paragraph 1
b. “In 2006, the International Astronomical Union (IAU) changed Pluto's classification
from planet to dwarf planet." Paragraph 1
c. “The National Aeronautics and Space Administration (NASA) introduced the world's
first exploratory mission to travel to Pluto in 2006." Paragraph 2
d. “Called New Horizons, this mission launched a spacecraft designed to collect
important data about Pluto." Paragraph 2