Which Statement,if True,would Lead to Serious Problems in DNA Replication

Which statement,if true,would lead to serious problems in DNA replication?

A) Unwinding of the DNA molecules occurs as hydrogen bonds break.
B) The process is known as semiconservative replication because one old strand is conserved in the new molecule.
C) Replication occurs as each base is paired with another exactly like it.
D) Complementary base pairs are held together with hydrogen bonds.
E) The enzyme that catalyzes DNA replication is DNA polymerasE.