Five questions from the paper you will actually sit

Under the Inland Rules, purse seiners hampered by fishing gear may exhibit ______.

1. A.two yellow lights in a vertical line with equal fixed intensity
2. B.two yellow lights in a vertical line flashing alternately every second
3. C.one yellow light over one white light flashing alternately
4. D.two white lights in a vertical line flashing alternately every second