[单选题]
1. Which enzyme is responsible fol-nm8 bc*av * nmk2ko(r the breaking of the hydrogen bocpjwj klc* ,6zetlc(uv:sd8m)), 6 jinds in DNA to allow transcriptii cs j:d6e(jl )jc*m zl,ucv)8tk,6p won to occur?
A. Helicase.
B. Gyrase.
C. RNA polymerase
D. Translatase.