If the distance between two consecutive base pairs is $0.34 \, nm$ and the total number of base pairs of a $DNA$ double helix in a typical mammalian cell is $6.6 \times 10^{9} \, bp$,then the length of the $DNA$ is approximately:
- A$2.7 \, meters$
- B$2.0 \, meters$
- C$2.5 \, meters$
- D$2.2 \, meters$
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