In DNA replication, the leading strand of DNA ________, while the other newly forming strand, called ...

In DNA replication, the leading strand of DNA ________, while the other newly forming strand, called the lagging strand, ________.
 
  A) is synthesized in the 5'  3' direction; the new DNA is synthesized in the 3'  5' direction
  B) is synthesized in the 3'  5' direction; the new DNA is synthesized in the 5'  3' direction
  C) does not require an RNA primer; an RNA primer is required
  D) is synthesized as a continuous chain; the new DNA is formed in a series of short, discontinuous fragments
  E) is synthesized in a series of short, discontinuous fragments; the new DNA is synthesized as a continuous chain