PLEASE HURRY I WILL VOTE BRAINLIEST! ACTUALLY ANSWER PLEASE!!

What aspect of DNA’s structure most likely made Meselson and Stahl, as well as other scientists, suspect that DNA replication is semiconservative?

A. The shape of its nucleotides

B. The paired, antiparallel DNA strands

C. The bonding between phosphate groups

D. The limited number of base pairs