Why Do We Refer to the NAChR as a Receptor

Why do we refer to the nAChR as a receptor rather than a channel?

A) To distinguish it from muscarinic receptors, which do not form a channel
B) Because it is present in skeletal muscle and electric organs (a modified form of muscle) as well as neurons
C) Because its principal function is reception of signals from presynaptic partners
D) To emphasize its commonality with other Cys-loop receptors and dissimilarity compared to voltage-activated ion channels
E) Because its ligand-binding properties more substantively contributed to its characterization than the conduction properties of its channel