A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω1. Another resistance R is added in series with the circuit. The new lower half power frequency will be

• A. ω1
• B. less than ω1
• C. more than ω1
• D. either more than ω1 or less then ω1