Definition: You are given a question on machine learning. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: For a Gaussian Bayes classifier, which one of these structural assumptions is the one that most affects the trade-off between underfitting and overfitting:
(A)Whether we learn the class centers by Maximum Likelihood or Gradient Descent (B)Whether we assume full class covariance matrices or diagonal class covariance matrices (C)Whether we have equal class priors or priors estimated from the data. (D)Whether we allow classes to have different mean vectors or we force them to share the same mean vector
