Which statement is true about this food chain :-Grass $\rightarrow$ Rabbit $\rightarrow$ Snakes $\rightarrow$ Hawks

Question

$\begin{array}{1 1}(a)\;\text{Each population is omnivorous}\\(b)\;\text{Each predator population has a greater biomass than its prey population}\\(c)\;\text{Both (a) & (b)}\\(d)\;\text{Each population has a greater biomass than its predator population}\end{array} $