Teacher:In this task, you will be presented with a question having multiple possible answers in Vietnamese language. And you should choose a most suitable option out of "A", "B", "C", "D", and "E" based on your commonsense knowledge.
Teacher: Now, understand the problem? Solve this instance: Question: Lâu đài nào được xây dựng trên Castle Rock ở Scotland? 
 Options: A edinburgh B London C bắt cầm đồ D nước Đức E Châu Âu 
Student:
A