Rank the Following in Order of Decreasing Importance as a Contributing

Multiple Choice

Rank the following in order of decreasing importance as a contributing resonance structure to the molecular structure of acetone, CH₃COCH₃ (more important > less important)

A) 1 > 2 > 3
B) 1 > 3 > 2
C) 2 > 1 > 3
D) 3 > 1 > 2