Which of the following is NOT a function of the recommended dietary allowance (RDA)?
A. to prevent nutrient deficiencies
B. to reduce the risk of disease
c. to meet nutritional needs
D. to prevent nutrient overdoses

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the plates spread at mid-ocean ridges (they are divergent plate boundaries) which allows magma to rise through the weakness between the plates. the magma then emerges as lava from the boundary and cools, creating a new crust.