问题：
[单选题]In a neuron, the main function of the dendrites (树突) is to ( )
Arelease neurotransmitters (神经递质) to signal subsequent neurons
Bpreserve the speed and integrity (完整性) of the neural signal as it propagates (传导) down the axon (轴突)
Cperform the metabolic (代谢) reactions necessary to nourish (滋养) and maintain the nerve cell
Dreceive input from other neurons
答案解析：