Either is correct
Until fairly recently, restaurants and fast-food stops were not open 24/7. Often the only place to take a break and have a cup of coffee in the wee hours of the morning was at the open-all-night doughnut shop.
Doughnuts are inexpensive. If a law enforcement officer was called to an emergency, he or she didn’t have to ditch an expensive meal.
Doughnuts are convenient. That hole-in the middle makes them easy to handle and can be eaten on the run.
A 2013 book of meditations, parables and inspirations by Linda Gillis, a retired church secretary.
The theory that if you eat one doughnut, you will want another.
A handy description of a theory that the shape of the universe is a three-dimensional torus (a surface or solid formed by rotating a closed curve.)
The round shape ensures consistent cooking, without gooey, undone centers.
A sea captain needed both hands to steer and ordered his fried pastry with a hole in the center as a convenience.
So they could be served on a skewer.
A and B
Fruits and nuts
Vegetables and corn flour
Flour, eggs, and sugar
Rice and flour