The first domestically developed unmanned helicopter, AR500C, of which country focused on plateau operations recently made its maiden flight?

The first domestically developed unmanned helicopter, AR500C, of which

1.	The first domestically developed unmanned helicopter, AR500C, of which country focused on plateau operations recently made its maiden flight?
A.	USA
B.	China
C.	Russia
D.	Germany
E.	Italy
Answer» C. Russia