Which of the following statements about the Work in Process account is true?

1) Both job-order cost and process cost systems use only one Work in Process account.

2) Both job-order cost and process cost systems use several Work in Process accounts.

3) Job-order cost systems use several Work in Process accounts, but process cost systems use only one.

4) Job-order cost systems use only one Work in Process account, but process cost systems use several.