<HELP> One question about Meselson-Stahl experiment

[SAT2400]

Homework Statement

In the Meselson-Stahl experiment, which banding pattern expected by which hypothesis/es would be the same?

A. A single, medium-density band after the first replication is expected by both the semi-conservative and the dispersive hypotheses.
B. A single, medium-density band after the second replication is expected by both the semi-conservative and the conservative hypotheses.
C. Two bands (one high-density, one low density) after the first replication is expected by both the semi-conservative model and the conserviative models
D. Two bands after the first replication are expected for both the conservative and the dispersive hypotheses.
E. None of the above.

Homework Equations

Meselson-Stahl experiment

The Attempt at a Solution

I think it's C, but my friend said it's A...
Please help! Thank you!

 

[Kalirren]

Could you explain why you think your answer is right?

More generally, what should happen after each replication (first, second) under each of the three hypotheses? That's only 6 things, you should be able to do that in one post.