25 POINTS!!!!!!!
(LC)Which sentence below shows correct use of em dashes?
A. In a-thousand-years, most of our greatest monuments such as they are will have crumbled to nothing.
B. In a thousand years, most of our greatest monuments – such as they are – will have crumbled to nothing.
C. In a thousand years, most of our greatest – monuments such as – they are will have crumbled to nothing.
D. In a thousand years, most of our greatest monuments such as they are will have crumbled-to-nothing.