What is a major difference between DNA replication and DNA transcription?

A.
DNA replication takes place in the nucleus, while DNA transcription takes place in the cytoplasm.
B.
DNA transcription only occurs in multicellular organisms, while DNA replication occurs in all organisms.
C.
DNA replication involves the nitrogenous base uracil, while DNA transcription involves the nitrogenous base thymine.
D.
RNA molecules produced by transcription are much shorter in length than DNA molecules produced by replication.