A drone flies 10ms−1 due east for 120s, then turns and flies 8ms−1 for 150s in a direction 30∘ north of east. The magnitude and direction of its total displacement from the starting point are closest to
a) 2.08km at 30∘ north of east
b) 2.32km at 15∘ north of east
c) 2.32km at 15∘ east of north
d) 2.47km at 14∘ north of east