The correct answer is C - 88
Before the constellations were defined by the International Astronomical Union (IAU), there was inconsistency across various star charts. Astronomers could make up new constellations as they saw fit, and would sometimes do so to please their patrons.
The International Astronomical Union was formed in 1919 as a way of standardising astronomy across countries and improving international collaboration in astronomical science.
One of its first tasks was to define a list of constellations. In 1922, the IAU defined a list of 88 constellations, which are still in use today.
