Since Dideoxy Sequencing Is Based on the Chain Termination,why Are

Multiple Choice

Since dideoxy sequencing is based on the chain termination,why are normal deoxynucleotides also included in the reaction?

A) to enhance the chain termination ability of the deoxynucleotides
B) to provide a substrate for DNA polymerase
C) to produce a range of DNA synthesis products that terminate at every occurrence of a particular base
D) to create DNA synthesis products long enough to allow running a gel