The subject is “milk.” The prepositional phrase is “in the cup.” The verb is “is.”
Your answer is A. racers, because racers is direct.
The right answer for the question that is being asked and shown above is that: "An unabridged English-language dictionary is a shortened dictionary for everyday use, and it is the dictionary that most people have in their homes and offices."
That would be a practical exercise. Practical means the actual doing or use of something rather than with theory and ideas. So it would apply to real life situations.
Hope this helps!