Why Did the Five- Kingdom System of Classification Fall Out

Multiple Choice

Why did the five- kingdom system of classification fall out of favor?

A) It was too difficult to distinguish plants from fungi and animals from protistans.
B) It was too complex-Linnaeus' original two- kingdom system was more useful.
C) It did not reflect the actual evolutionary relationships among organisms very well.
D) There were too few monerans to justify their classification at the kingdom level.