Explanation

Standard geological estimates state that igneous and metamorphic rocks make up about 90-95% of the Earth's crust by volume, while sedimentary rocks cover about 7.9% of the surface but constitute only a small fraction of the total crustal volume. Option B aligns with common textbook figures for volume distribution: ~64.7% igneous, ~27.4% metamorphic, and ~7.9% sedimentary.