Question

15. What is the most common way to form the plural of a noun? A. Add -ren B. Add -s C. Add -ves D. Add -es

Answer 1

Adding -s is the most common. for example: books, cups, pencils, etc. -es might have been the one that confused you, but that isn't a super common ending for plurals--instead, a more common one would be "-ies" which is when you drop the y (berry becomes berries, for example).