Regarding CBOW and Skip-Gram algorithms, which of the following statements is incorrect?

Regarding CBOW and Skip-Gram algorithms, which of the following statements is incorrect?
A . Both CBOW and Skip-Gram can be used to train word embeddings, but Skip-Gram is faster than CBOW.
B . CBOW calculates the probability of a word appearing based on the n words preceding it or the n consecutive words before and after it.
C . Skip-Gram calculates the probabilities of several words before and after a certain word.
D . Both the CBOW model and the skip-gram model are based on the Huffman tree.

Answer: A