How Would You Compare the Onset of Rigor Mortis with a Frog

How would you compare the onset of rigor mortis with a frog versus a rat?

A) A rat would enter rigor mortis significantly faster than a frog upon death.
B) A frog would enter rigor mortis significantly faster than a rat upon death.
C) The frog and rat would enter rigor mortis at the same time regardless of the external environment as long as the time of death was the same.
D) The frog would enter rigor mortis at the same time as the rat if they died at the same time and the frog was at 37 ^$\circ$ C.