3. Which of the following statement is INCORRECT?
(A) In designing a machine learning system, signal processing methods can be a very valuable data pre-processing tool.
(B) When the training and testing errors of a neuron network is becoming larger and larger, we should terminate thetraining process to avoid the overfitting problem.
(C) The key of human intelligence comes from the connection weights between the neuron.
(D) Generally speaking, one of the difficulties encountered by most of the optimization methods is in finding globalminimum.
(E) Compared to batch learning, the sequential learning method can more accurately estimate the gradient of the errorfunction.