Digital manufacturing combines to manufacture products. (check all that apply.)

Same issue happened to me i had 4/5 and suddenly they went down to 3/5 .the reason must be that the question u recived a brainliest answer mark, was deleted by a moderator. they can delete a question for some reason if it isn't complete or has been reported. so there for that is most likely the reason.best of hope u earn another one

The high speed memory

In 1973 was when graphical user interfaces (guis) pioneered.

Ibelieve its true but not sure hope this .