The subject here is simple" it's just "Antarctica" .
The verb is also not compound, it's a simple verb: "has".
The compound part of the sentence is the object: it is: "a thick ice cover and the highest average elevation of all the continents"
so the correct answer is "compound subject"
Just keep at it! The only way to learn a new language is to keep studying and working at it. I wish you the best of luck!
I think it’s the first one. One impacts how well you do on the other.
Answer:
she don't. do her homework