The answer is d. all of the above.
A visual test is any media that you see that is not in words or a video. This includes paintings, photographs, scetches, etc.
Words that roughly sound alike, spell alike but have different meanings could include,
Flour , flower
A, all at once, but I may be wrong. So, you should try and go with what you lesson says and see if my answer makes sense. <3 :)