the key phrase here is the following
oxalic acid, a substance that greatly impedes calcium absorption by the bodyIf we do have something that counteract the acid to absorb the calcium we have a solution
(A)
Rice, which does not contain calcium, counteracts the effects of oxalic acid on calcium absorption.Correct
(B) Dairy products, which contain even more calcium than spinach does, are often eaten by people who eat spinach on a regular basis.
Even if we do have more calcium we do not solve the problem of the absorption
(C) Neither the calcium nor the oxalic acid in spinach is destroyed when spinach is cooked.
This at most strengthen the argument
(D) Many leafy green vegetables other than spinach that are rich in calcium also contain high concentrations of oxalic acid.
Compound situation
(E) Oxalic acid has little effect on the body's ability to absorb nutrients other than calcium.
Other than calcium.....of
A is the answer
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