Given a room temperature of approximately 27 C, which of the following is the frequency of sound having a loudness of 65.0 dB? Assume that the air density at this temperature is 0.001161 kg /L. The speed of sound at this temperature is 347 m /s and the maximum displacement of air molecules is 1.75 x 10-6 m. Select one: O a. 11.40 Hz O b. 71.60 Hz O c. 69.64 Hz O d. 2264.1 Hz