In the simple knee-jerk reflex circuit (Figure Q1-13): Figure Q1-13

A) sensory neuron connectivity exemplifies divergent excitation.
B) sensory neuron axons terminate directly on the extensor muscles to stimulate contraction.
C) sensory neurons form monosynaptic connections with the flexor motor neurons.
D) sensory neuron excitation stimulates contraction of the flexor muscle.
E) All of the above