Which best identifies a suffix and how it changes the meaning of the word?

1. The suffix in journalism is -ism; it changes the word to mean "the practice writing of current news."

2. The suffix in recycle is re-; it changes the word to mean "to process again."

3. The suffix in nihilism is -ism; it changes the word to mean "to make nothing."

4. The suffix in preapprove is pre-; to changes the word to mean "to give permission in advance."

Please answer quickly i'm the test and I have a lot overdue.