The magnesium isotope with 13 neutrons express your answer as an isotope.

Mg is read as “magnesium 25,” and can be written as “magnesium-25” or “Mg-25.” All magnesium atoms have 12 protons in their nucleus. They differ only because a 24Mg atom has 12 neutrons in its nucleus, a 25Mg atom has 13 neutrons, and a 26Mg has 14 neutrons.

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

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the answer is b & c i believe : )