Answer:
Option A)
Explanation:
Option A) is the most effective sentence that has the addition of the clause because it is the most direct and logical.
Option B) does not follow the normal sentence structure of the English language and, while it conveys the information correctly, it is confusing to the reader.
Option C) follows the normal sentence structure, much like that of Option A), but this sentence does not convey our information correctly. Mr. Busbin must be the one to tell Angelika about the opera and not the other way around.
Option D) is much like Option B), only with the added "is what" in the sentence. It makes it clearer, but it still is not the most effective.
I hope this helps!
