Which trophic level gets the least amount of energy?

Question

a) producers
b) herbivores
c) carnivores
d) decomposers

I think the answer is c, but i'm not sure if it's right.
I posted this question earlier, but google didn't provide with an answer. I still think the answer is C, because decomposers get energy from all of them, produers, herbivores, and carnivores. Please tell me if i'm correct

Answer 1

C should be right, since energy is lost in the form of heat from ALL of these stages, with carnivores at the top. I'm not as certain about D, but you make a good point.