Refer to the chemical formula of dideoxycytidine. 
The drug dideoxycytidine, used to treat certain viral infections, is a nucleotide made with 2',3'-dideoxyribose.This sugar lacks -OH groups at both the 2' and the 3' positions.This drug stops the growth of a DNA chain when added to DNA because
A) DNA ligase cannot link nucleotides.
B) DNA helicase is blocked.
C) DNA polymerase requires a 3' end -OH group.
D) telomerase is unable to elongate the lagging strand.
E) the sliding DNA clamp dissociates from the DNA strand.
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