A string with mass density μ = 1.30×10⁻³ kg/m is under a tension of F = 344 N. One of its resonance frequencies is 526.0 Hz, and the next higher resonance frequency is 701.3 Hz. What is the fundamental frequency of this string?
A. 438.0 Hz
B. 482.7 Hz
C. 574.6 Hz
D. 526.0 Hz