Many Elements in Seawater Are Found in Constant Ratios Throughout

Multiple Choice

Many elements in seawater are found in constant ratios throughout the ocean because

A) The input of dissolved substances from rivers is broadly constant throughout the ocean
B) Dissolved material in the ocean has been there for millions of years, with no input or removal
C) They remain in the ocean longer than the mixing time
D) This is not true; no elements are generally found in constant ratios