Hello! Your answer is B, the chromosomes must replicate.
Meiosis is a process which takes one diploid cell (46 chromosomes) and makes 4 haploid cells (23 chromosomes). In order to do this, the DNA must divide. This is because it takes 46 chromosomes, to make 4*23 chromosomes, or 92.
We see here that the amount of chromosomes must double before meiosis. This therefore means A is incorrect, as the DNA only needs to duplicate 2 times. This also proves B correct, as the replication of chromosomes is what we're looking for.
C and D are incorrect, as they are actual processes in meiosis, meaning they do not happen before.
Hope this helps!
