Considering That Marine Bony Fish Cannot Excrete Excess Salt in Their

Considering that marine bony fish cannot excrete excess salt in their urine, how do they deal with the salt loads from ingested food?

A) Their guts do not absorb some of the ions they take in, especially divalent ions such as Mg²⁺or SO₄^2-.
B) NaCl, the major salt ingested, is excreted across the gill membranes.
C) They do not take in much salt.
D) Both a and b
E) All of the above