Which of the Following Is True

Multiple Choice

Which of the following is true

A) GARCH (1,1) will always give a maximum likelihood at least as high as EWMA
B) EWMA will always give a maximum likelihood at least as high as GARCH (1,1)
C) The maximum likelihood is the same for GARCH (1,1) and EWMA
D) Sometimes A is true and sometimes B is true.