Question 5 1 pts Which of the following statement is true? Select all that apply. (Note that you will get partial credits for each correct answer. But you will also lose points for each incorrect answer.) Cl MCMC is the safest choice. but it can be slow to get accurate answers. El The EM algorithm is guaranteed to never decrease the value of its objective function on any iteration. B The objective function optimized by the EM algorithm can also be optimized by a gradient descent algorithm which will nd the giobal optimal solution, whereas EM finds its solution more quickly but may return only a locally optimal solution. l: Gaussian mixture models are not easy to work with; one of the Gaussian components may collapse onto a single data point