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@@ -118,14 +118,13 @@ theories~\cite{kambe_odd-parity_2018, haule_arrested_2009, rau_hidden_2012, riggs_evidence_2015, hoshino_resolution_2013, ikeda_theory_1998, chandra_hastatic_2013, harrison_hidden_nodate, ikeda_emergent_2012} propose associating any of a variety of broken symmetries -with \ho. This work analyzes a phenomenological model of order parameters of -general symmetry that couple linearly to strain. We identify yet another mechanism -that is best compatible with two experimental observations: first, the $\Bog$ -``nematic" elastic susceptibility $(C_{11}-C_{12})/2$ softens anomalously from -room temperature down to -$T_{\text{\ho}}=17.5\,\K$;\cite{de_visser_thermal_1986} and second, a $\Bog$ -nematic distortion is observed by x-ray scattering under sufficient pressure to -destroy the \ho\ state.\cite{choi_pressure-induced_2018} +with \ho. This work analyzes a phenomenological model with order parameters of +general symmetry that couple linearly to strain. Of these, only one is compatible +with two experimental observations: first, the $\Bog$ ``nematic" elastic +susceptibility $(C_{11}-C_{12})/2$ softens anomalously from room temperature +down to $T_{\text{\ho}}=17.5\,\K$;\cite{de_visser_thermal_1986} and second, a +$\Bog$ nematic distortion is observed by x-ray scattering under sufficient +pressure to destroy the \ho\ state.\cite{choi_pressure-induced_2018} Recent resonant ultrasound spectroscopy (\rus) measurements were used to examine the thermodynamic discontinuities in the elastic moduli at |