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In Meselson's and Stahl's DNA replication experiment, "parent" bacteria were grown in a medium of heavy nitrogen (15N) and then allowed to grow thereafter in light nitrogen (14N) media. Because replication is semiconservative,

A) the next generation is mid-weight or hybrid (15N-14N), and the subsequent generation is 25% heavy, 50% hybrid, and 25% light nitrogen.

B) the second and all subsequent generations will be hybrid (15N-14N) strands.

C) the second generation will be hybrid (15N-14N) strands, and all subsequent generations will regress towards higher proportions of light nitrogen (14N).

D) the next generation will be all light (14N) because heavy nitrogen will be corrected as a replication error.

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