Fragments Like Those Now Called Okazaki Fragments Might Have Been

Fragments like those now called Okazaki fragments might have been hypothesized even before they were discovered by Reiji Okazaki because

A) DNA replicates in the 3'-to-5' direction.
B) single-stranded 5'-to-3' DNA appears behind DNA polymerase.
C) DNA nucleotides are added to the 5' end of the primer on the lagging strand.
D) RNA primase places short RNA primer sequences along the DNA molecule.
E) DNA polymerase I can connect short segments.