Which of the Following Best Describes the Composition of Soil

Multiple Choice

Which of the following best describes the composition of soil?

A) Soil is primarily mineral matter (approximately 72%) , but also consists of organic matter (10%) , and water (18%) .
B) Soil consists of approximately 45% organic matter, 50% mineral matter, and 5% water and/or air.
C) Soil is composed of about 45% mineral matter, 5% organic matter, and 50% pore space containing air and water.
D) Soil includes pebbles, gravel, cobbles, and a varying combination of sands, silts, and clays.