Which statement correctly contrasts CDL knowledge-test and skills-test language rules under FMCSA test-method standards?

1. Knowledge tests may be written, verbal, or automated and may be in a foreign language without an interpreter; skills tests prohibit interpreters and require English commands and responses
2. Both knowledge and skills tests must always be administered through an interpreter
3. Skills tests may be taken in any language if passengers translate
4. Knowledge tests are optional when the applicant speaks English