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Hershey and Chase used radioactive \( { }^{35} S \) and \( { }^{32} P \) in experiments to provide evidence that DNA was the genetic material. These experiments pointed to DNA because
(a) progeny viruses retained \( { }^{32} \mathrm{P} \) but not \( { }^{35} \mathrm{~S} \)
(b) retention of \( { }^{32} \mathrm{p} \) in progeny viruses indicated that DNA was passed on
(c) loss of \( { }^{35} \mathrm{~S} \) in progeny viruses indicated that proteins were not passed on
(d) All of the above
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