Primers Are Needed for the Enzyme Polymerase

Primers are needed for the enzyme polymerase

A) To start adding nucleotides on the 5' end until the template is fully copied.
B) To start copying the template on the 3' end until a stop codon.
C) To start adding nucleotides on the 3' end of it until it copies the full template.
D) To start polymerizing nucleotides on the template.
E) To copy the template and the primers themselves until turning of the PCR.