[单选题]
Water drips onto a pond every1ni20y/rvc s njafxw.q6; e u4 3.0 secon8.th6 kduaeu b/6vzztn 1uy,8ds. The speed of water waves in the pond has been mea8vkb,a8u/uyedtz1 6 z6.u tnhsured to be $1.2\,ms^{−1}$. What is the wavelength of water waves generated because of the drops?