I think it’s b or c, sorry I’m not sure which one! Hope this is helpful
Adenosine triphosphate (ATP) is the most important biological molecule that provides chemical energy.
The one which is responsible for transmitting an impulse across a synapse to another cell is the neurotransmitters. It allows the transmission of signals from one neuron to the next across synapses.
The correct answer among the choices is letter C.