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Core-collapse supernovae (CCSNe) are the explosions of massive starsfollowing the collapse of the stars' iron cores. Poznanski (2013) has recentlysuggested an observational correlation between the ejecta velocities and theinferred masses of the red supergiant progenitors of type II-P explosions,which implies that the kinetic energy of the ejecta ($E_{\textrm{kin}}$)increases with the mass of the progenitor. I point out that the same conclusioncan be reached from the model-free observed correlation between the ejected$^{56}$Ni masses ($M_{\textrm{Ni}}$) and the luminosities of the progenitorsfor type II supernovae, which was reported by Fraser et al. (2011). Thiscorrelation is in an agreement with the predictions of the collapse-inducedthermonuclear explosions (CITE) for CCSNe and in a possible contradiction withthe predictions of the neutrino mechanism. I show that a correlation between$M_{\textrm{Ni}}$ and $E_{\textrm{kin}}$ holds for all types of CCSNe(including type Ibc). This correlation suggests a common mechanism for allCCSNe, which is predicted for CITE, but is not produced by current simulationsof the neutrino mechanism. Furthermore, the typical values of$E_{\textrm{kin}}$ and $M_{\textrm{Ni}}$ for type Ibc explosions are larger byan order of a magnitude than the typical values for II-P explosions, a factwhich disfavors progenitors with the same initial mass range for theseexplosions. Instead, the progenitors of type Ibc explosions could be massiveWolf-Rayet stars, which are predicted to yield strong explosions with lowejecta masses (as observed) according to CITE. In this case, there is nodeficit of high mass progenitors for CCSNe, which was suggested under theassumption of a similar mass range for the progenitors of types II-P and Ibcsupernovae.

The progenitors of core-collapse supernovae suggest thermonuclear origin for the explosions