With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Heavy metal poisoning from consuming fish oil supplements is highly unlikely, because heavy metals (mercury, lead, nickel, arsenic, and cadmium) selectively bind with protein in the fish flesh rather than accumulate in the oil.
text_B: Since heavy-metal toxicity is something that occurs slowly over a lifetime, in even the worst case scenario, could fish-oil supplements still be taken by the elderly without undue worry?
YES.