Why does the NMDAR provide a good molecular mechanism for coincidence detection? Select the best answer.

A) It is the receptor for glutamate, the major excitatory transmitter in the brain.
B) It requires depolarization to remove the Mg²⁺ block.
C) It allows Ca²⁺ into the postsynaptic neuron.
D) The NMDAR channel can remain open for long periods of time.
E) It is expressed in the hippocampus.