$35.$ True or false, according to the text, principles of design are to the layout artist what the rules of grammar are to the writer and should include: a$.$ design in balance b$.$ Space within the ad that is broken up into pleasing proportions c$.$ A directional pattern that is evident, so the reader knows in what sequence to read d$.$ A force that holds the ad together and gives it unity e$.$ One element or one part of the ad that has enough emphasis to dominate all of the others.