The best and most correct answer among the choices provided by your question is the second choice or letter B.
<span>Radioisotopes are used to preserve food because radioisotopes: can kill the bacteria, mold, insect eggs and yeast that cause food to spoil quickly.</span>
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Its d but not 100 percent sure
Alvin was a deep sea vehicle which was used to explore the depths of the ocean. It sunk but was recovered and recommissioned in 1973 after which it discovered black smokers, a special type of hydrothermal vent which produces super heated water with a highly acidic pH. Thus, the answer is B.
