29. In a Lineweaver-Burk double reciprocal plot, the intercept of the y-axis equals ______.(A) $K_{\mathrm{M}}$(B) - $1 / K_{\mathrm{M}}$(C) $V_{\max}$(D) $1 / V_{\max}$(E) $k_{\mathrm{cat}} / K_{\mathrm{M}}$.