Starting from One Oasis, a Camel Walks 25 Km in a Direction

Starting from one oasis, a camel walks 25 km in a direction 30° south of west and then walks 30 km toward the north to a second oasis. What is the direction from the first oasis to the second oasis?

A) 21° N of W
B) 39° W of N
C) 69° N of W
D) 51° W of N
E) 42° W of N