The set of elements that has been measured to the greatest degree of precision in terms of their composition in Earth's crust is D: Oxygen and Silicon. Oxygen and silicon are the two most abundant elements in the Earth's crust, and their proportions are well-documented and measured with high precision in geological studies. Oxygen accounts for about 46.6% and silicon for about 27.7% of the crust by weight, making them the primary constituents.
ELEMENTS COMPOSING EARTH’S CRUST Scientists have discovered 88 natural elements and produced an additional 24 artificial elements for a total of 112 known elements. Eight of these elements make up approximately 98.6% of Earth’s outer crust. Choose the set of elements below which has been measured to the greatest degree of precision. A Aluminum, Iron, and Potassium B Oxygen and Sodium C Silicon, Calcium, and Magnesium D Oxygen and Silicon
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