Question

Which sentence correctly forms the plural of the number 4?

A. The kindergarten students are learning numbers, and using their fingers to write 4's in the sand.
B. The kindergarten students are learning numbers, and using their fingers to write 4s in the sand.
C. The kindergarten students are learning numbers, and using their fingers to write 4s' in the sand.

Answer 1

A. because the " ' " has to be before the s