What is the frequency range of microwaves?
- A$0.3 \, GHz$ to $300 \, GHz$
- B$54 \, MHz$ to $890 \, MHz$
- C$3 \, GHz$ to $300 \, GHz$
- D$4 \times 10^{14} \, Hz$ to $7 \times 10^{14} \, Hz$
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