A fishing boat sails 5 km South in still waters, then turns East and sails 8 km, then turns North and sails 5 km, then turns to its right and sails 10 km. Where is the boat now with reference to its starting position?

A

18 km to the East of the starting position.

B

2 km to the West of the starting position.

C

18 km to the West of the starting position.

D

2 km to the East of the starting position.